diff --git a/Ads Weekly.xlsx b/Ads Weekly.xlsx
new file mode 100644
index 0000000..8e44ceb
Binary files /dev/null and b/Ads Weekly.xlsx differ
diff --git a/App.tsx b/App.tsx
index 5daa6bc..07643b7 100644
--- a/App.tsx
+++ b/App.tsx
@@ -3,6 +3,7 @@ import React, { useState, useMemo, useEffect, useCallback } from 'react';
 import FileUpload from './components/FileUpload';
 import Dashboard from './components/Dashboard';
 import DataGrid from './components/DataGrid';
+import WeeklyGrid from './components/WeeklyGrid';
 import TopMovers from './components/TopMovers';
 // import AdvertisingDashboard from './components/AdvertisingDashboard'; // Removed
 import FilterBar from './components/FilterBar';
@@ -31,7 +32,7 @@ const App: React.FC = () => {
   const [adsData, setAdsData] = useState<AdsRecord[]>([]); // New Ads State
   const [loading, setLoading] = useState(true);
   const [syncing, setSyncing] = useState(false);
-  const [view, setView] = useState<'dashboard' | 'table' | 'movers' | 'ads'>('dashboard'); // Added 'ads' view
+  const [view, setView] = useState<'dashboard' | 'table' | 'weekly' | 'movers' | 'ads'>('dashboard'); // Added 'weekly' view
   const [isChatOpen, setIsChatOpen] = useState(false);
   const [activeUrl, setActiveUrl] = useState<string | null>(() => localStorage.getItem('craze_csv_url') || PERMANENT_DROPBOX_URL);
   const [lastUpdated, setLastUpdated] = useState<string | null>(null);
@@ -377,6 +378,13 @@ const App: React.FC = () => {
               >
                 <TableIcon /> <span className="hidden sm:inline">Grid</span>
               </button>
+              <button
+                onClick={() => setView('weekly')}
+                className={`flex items-center gap-2 px-3 py-2 rounded-md text-sm font-medium transition-all
+                  ${view === 'weekly' ? 'bg-slate-800 text-white shadow-sm ring-1 ring-white/10' : 'text-slate-400 hover:text-white hover:bg-slate-800/50'}`}
+              >
+                <TrendingIcon /> <span className="hidden sm:inline">Weekly Sales</span>
+              </button>
               <button
                 onClick={() => setView('movers')}
                 className={`flex items-center gap-2 px-3 py-2 rounded-md text-sm font-medium transition-all
@@ -410,6 +418,7 @@ const App: React.FC = () => {
                 />
               )}
               {view === 'table' && <DataGrid data={combinedAdsData} hasCustomerFilter={filters.customer.length > 0} adsData={filteredAdsData} />}
+              {view === 'weekly' && <WeeklyGrid data={combinedAdsData} />}
               {view === 'movers' && <TopMovers data={filteredData} />}
             </div>
           </>
diff --git a/components/WeeklyGrid.tsx b/components/WeeklyGrid.tsx
new file mode 100644
index 0000000..81987b9
--- /dev/null
+++ b/components/WeeklyGrid.tsx
@@ -0,0 +1,87 @@
+import React, { useMemo } from 'react';
+import { CombinedKPIs } from '../types';
+import { pivotWeeklySalesData, WeeklyPivotRow } from '../services/dataProcessor';
+
+interface WeeklyGridProps {
+    data: CombinedKPIs[];
+}
+
+const WeeklyGrid: React.FC<WeeklyGridProps> = ({ data }) => {
+    const { rows, weeks } = useMemo(() => pivotWeeklySalesData(data), [data]);
+
+    // Calculate totals per week
+    const weekTotals = useMemo(() => {
+        const totals: { [weekKey: string]: number } = {};
+        weeks.forEach(week => {
+            totals[week] = rows.reduce((sum, row) => sum + (row.unitsByWeek[week] || 0), 0);
+        });
+        return totals;
+    }, [rows, weeks]);
+
+    const renderGrowth = (current: number, previous: number) => {
+        if (!previous || previous === 0) return null;
+        const pct = ((current - previous) / previous) * 100;
+        const isPositive = pct >= 0;
+
+        return (
+            <div className={`text-[10px] flex items-center gap-0.5 mt-0.5 font-bold ${isPositive ? 'text-emerald-400' : 'text-red-400'}`}>
+                {isPositive ? '▲' : '▼'}{Math.abs(pct).toFixed(0)}%
+            </div>
+        );
+    };
+
+    return (
+        <div className="bg-slate-900/50 border border-white/10 rounded-xl overflow-hidden animate-fade-in shadow-2xl">
+            <div className="overflow-x-auto overflow-y-auto max-h-[calc(100vh-280px)]">
+                <table className="w-full text-left border-collapse min-w-[1000px]">
+                    <thead className="sticky top-0 z-20">
+                        <tr className="bg-slate-900 border-b border-white/10">
+                            <th className="p-4 text-xs font-black text-slate-400 uppercase tracking-widest sticky left-0 z-30 bg-slate-900 border-r border-white/5 w-[300px]">Product Details</th>
+                            {weeks.map(week => (
+                                <th key={week} className="p-4 text-xs font-black text-slate-400 uppercase tracking-widest text-center border-r border-white/5">
+                                    {week.split('-')[1]}/{week.split('-')[0].slice(-2)}
+                                </th>
+                            ))}
+                        </tr>
+                        <tr className="bg-slate-800/80 backdrop-blur-md border-b border-white/10 italic">
+                            <th className="p-3 text-sm font-black text-white sticky left-0 z-30 bg-slate-800 border-r border-white/5">Totals</th>
+                            {weeks.map((week, idx) => (
+                                <th key={week} className="p-3 text-sm font-black text-white text-center border-r border-white/5">
+                                    {weekTotals[week]?.toLocaleString('de-DE')}
+                                    {renderGrowth(weekTotals[week], weekTotals[weeks[idx + 1]])}
+                                </th>
+                            ))}
+                        </tr>
+                    </thead>
+                    <tbody className="divide-y divide-white/5">
+                        {rows.map((row) => (
+                            <tr key={row.id} className="hover:bg-white/[0.02] transition-colors group">
+                                <td className="p-4 sticky left-0 z-10 bg-slate-900 md:bg-slate-900/90 backdrop-blur-sm group-hover:bg-slate-800 border-r border-white/5">
+                                    <div className="flex flex-col">
+                                        <span className="text-xs font-black text-indigo-400 uppercase tracking-wider mb-0.5">{row.sku}</span>
+                                        <span className="text-[11px] text-white/80 line-clamp-1 group-hover:line-clamp-none transition-all">{row.title}</span>
+                                        <span className="text-[10px] text-fuchsia-400/70 font-bold mt-1 uppercase tracking-tighter">{row.line}</span>
+                                    </div>
+                                </td>
+                                {weeks.map((week, idx) => {
+                                    const val = row.unitsByWeek[week] || 0;
+                                    const prevVal = row.unitsByWeek[weeks[idx + 1]] || 0;
+                                    return (
+                                        <td key={week} className="p-4 text-center border-r border-white/5 align-top">
+                                            <span className={`text-sm font-black ${val > 0 ? 'text-white' : 'text-slate-600'}`}>
+                                                {val > 0 ? val.toLocaleString('de-DE') : '-'}
+                                            </span>
+                                            {val > 0 && renderGrowth(val, prevVal)}
+                                        </td>
+                                    );
+                                })}
+                            </tr>
+                        ))}
+                    </tbody>
+                </table>
+            </div>
+        </div>
+    );
+};
+
+export default WeeklyGrid;
diff --git a/generate-pdf.js b/generate-pdf.js
new file mode 100644
index 0000000..3d52b78
--- /dev/null
+++ b/generate-pdf.js
@@ -0,0 +1,29 @@
+const puppeteer = require('puppeteer');
+const path = require('path');
+
+(async () => {
+    const browser = await puppeteer.launch({ headless: 'new' });
+    const page = await browser.newPage();
+
+    // Set viewport for presentation
+    await page.setViewport({ width: 1280, height: 720 });
+
+    // Load the HTML file
+    const filePath = path.join(__dirname, 'presentacion.html');
+    await page.goto(`file://${filePath}`, { waitUntil: 'networkidle0' });
+
+    // Wait for images to load
+    await page.waitForTimeout(2000);
+
+    // Generate PDF
+    await page.pdf({
+        path: path.join(__dirname, 'CrazeAnalytix_Presentation.pdf'),
+        format: 'A4',
+        landscape: true,
+        printBackground: true,
+        margin: { top: '0', right: '0', bottom: '0', left: '0' }
+    });
+
+    console.log('PDF generated successfully!');
+    await browser.close();
+})();
diff --git a/presentacion.html b/presentacion.html
new file mode 100644
index 0000000..4ed82c4
--- /dev/null
+++ b/presentacion.html
@@ -0,0 +1,1132 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>CrazeAnalytix - Executive Presentation</title>
+    <style>
+        @page {
+            size: A4 landscape;
+            margin: 0;
+        }
+
+        @media print {
+            .slide {
+                page-break-after: always;
+                page-break-inside: avoid;
+                height: 100vh !important;
+            }
+
+            .slide:last-child {
+                page-break-after: auto;
+            }
+
+            body {
+                -webkit-print-color-adjust: exact !important;
+                print-color-adjust: exact !important;
+            }
+
+            .print-instructions {
+                display: none;
+            }
+        }
+
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
+            color: #e2e8f0;
+            line-height: 1.5;
+        }
+
+        .slide {
+            height: 100vh;
+            padding: 35px 55px;
+            display: flex;
+            flex-direction: column;
+            justify-content: flex-start;
+            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
+        }
+
+        h1 {
+            font-size: 2.2rem;
+            background: linear-gradient(90deg, #818cf8, #c084fc);
+            -webkit-background-clip: text;
+            -webkit-text-fill-color: transparent;
+            background-clip: text;
+            margin-bottom: 10px;
+        }
+
+        h2 {
+            font-size: 1.4rem;
+            color: #94a3b8;
+            margin-bottom: 15px;
+        }
+
+        h3 {
+            font-size: 1.15rem;
+            color: #818cf8;
+            margin: 12px 0 8px;
+        }
+
+        p {
+            font-size: 0.95rem;
+            margin-bottom: 10px;
+            max-width: 900px;
+        }
+
+        ul {
+            margin-left: 20px;
+            margin-bottom: 12px;
+        }
+
+        li {
+            font-size: 0.9rem;
+            margin-bottom: 6px;
+        }
+
+        img {
+            max-width: 100%;
+            max-height: 280px;
+            border-radius: 8px;
+            box-shadow: 0 12px 25px -8px rgba(0, 0, 0, 0.5);
+            margin: 15px 0;
+            border: 1px solid #334155;
+            object-fit: contain;
+        }
+
+        img.large {
+            max-height: 350px;
+        }
+
+        table {
+            border-collapse: collapse;
+            margin: 12px 0;
+            width: 100%;
+            max-width: 700px;
+            font-size: 0.85rem;
+        }
+
+        th,
+        td {
+            border: 1px solid #475569;
+            padding: 8px 12px;
+            text-align: left;
+        }
+
+        th {
+            background: #334155;
+            color: #818cf8;
+        }
+
+        td {
+            background: #1e293b;
+        }
+
+        .highlight {
+            color: #34d399;
+            font-weight: bold;
+        }
+
+        .warning {
+            color: #f87171;
+        }
+
+        blockquote {
+            border-left: 4px solid #818cf8;
+            padding-left: 15px;
+            margin: 12px 0;
+            color: #94a3b8;
+            font-style: italic;
+            font-size: 0.9rem;
+        }
+
+        .flow-diagram {
+            background: #1e293b;
+            padding: 15px;
+            border-radius: 8px;
+            font-family: monospace;
+            font-size: 0.85rem;
+            white-space: pre;
+            margin: 12px 0;
+        }
+
+        .title-slide {
+            text-align: center;
+            justify-content: center;
+            align-items: center;
+        }
+
+        .title-slide h1 {
+            font-size: 3.2rem;
+        }
+
+        .title-slide h2 {
+            font-size: 1.8rem;
+        }
+
+        .grid-2 {
+            display: grid;
+            grid-template-columns: 1fr 1fr;
+            gap: 20px;
+            margin-top: 12px;
+        }
+
+        .grid-3 {
+            display: grid;
+            grid-template-columns: 1fr 1fr 1fr;
+            gap: 15px;
+            margin-top: 12px;
+        }
+
+        .card {
+            background: #1e293b;
+            padding: 15px;
+            border-radius: 8px;
+            border: 1px solid #334155;
+        }
+
+        .card h3 {
+            margin-top: 0;
+            font-size: 1rem;
+        }
+
+        .card p {
+            font-size: 0.85rem;
+            margin-bottom: 0;
+        }
+
+        .feature-list {
+            list-style: none;
+            margin-left: 0;
+        }
+
+        .feature-list li {
+            padding: 8px 12px;
+            background: #1e293b;
+            border-radius: 6px;
+            margin-bottom: 8px;
+            border-left: 3px solid #818cf8;
+        }
+
+        .print-instructions {
+            position: fixed;
+            top: 8px;
+            right: 8px;
+            background: #818cf8;
+            color: white;
+            padding: 12px 16px;
+            border-radius: 6px;
+            font-size: 0.8rem;
+            z-index: 1000;
+        }
+
+        .section-title {
+            background: linear-gradient(90deg, rgba(129, 140, 248, 0.2), transparent);
+            padding: 8px 15px;
+            border-radius: 6px;
+            margin-bottom: 15px;
+        }
+
+        .badge {
+            display: inline-block;
+            background: #818cf8;
+            color: white;
+            padding: 2px 8px;
+            border-radius: 4px;
+            font-size: 0.75rem;
+            margin-right: 5px;
+        }
+
+        .badge.green {
+            background: #34d399;
+        }
+
+        .badge.orange {
+            background: #fb923c;
+        }
+    </style>
+</head>
+
+<body>
+
+    <div class="print-instructions">
+        📄 <strong>Save as PDF:</strong> Cmd+P → "Save as PDF" → Landscape A4
+    </div>
+
+    <!-- SLIDE 0: Title -->
+    <div class="slide title-slide">
+        <h1>🎯 CrazeAnalytix</h1>
+        <h2>Amazon Sales Analytics Platform</h2>
+        <p style="margin-top: 25px; color: #64748b;">Complete Feature Documentation</p>
+        <p style="color: #64748b;">Executive Presentation • January 2026</p>
+    </div>
+
+    <!-- SLIDE 1: Executive Summary -->
+    <div class="slide">
+        <h1>📋 Executive Summary</h1>
+        <h2>What is CrazeAnalytix?</h2>
+
+        <p><strong>CrazeAnalytix</strong> is a comprehensive Business Intelligence platform designed to consolidate,
+            analyze, and visualize Amazon sales data across multiple European markets in real-time.</p>
+
+        <div class="grid-3">
+            <div class="card">
+                <h3>📊 3 Main Tabs</h3>
+                <p>Dashboard, Grid, and Movers - each serving different analytical purposes</p>
+            </div>
+            <div class="card">
+                <h3>🌍 6 Markets</h3>
+                <p>Amazon DE, IT, FR, ES, UK, and Seller Central (SC) data in one place</p>
+            </div>
+            <div class="card">
+                <h3>🔄 Automatic Sync</h3>
+                <p>Live connection to Dropbox with daily auto-refresh at 7:00 AM</p>
+            </div>
+        </div>
+
+        <h3>Core Capabilities:</h3>
+        <ul class="feature-list">
+            <li>📈 <strong>Year-over-Year Analysis</strong> - Compare 2024, 2025, and 2026 performance instantly</li>
+            <li>🌍 <strong>Pan-EU Grouping</strong> - View DE+IT+FR+ES as a unified European market</li>
+            <li>📅 <strong>Weekly & Monthly Trends</strong> - Detect seasonality and peak periods</li>
+            <li>🚀 <strong>Growth Analytics</strong> - Identify top performers and declining products</li>
+            <li>📥 <strong>CSV Export</strong> - Download filtered data for external analysis</li>
+        </ul>
+    </div>
+
+    <!-- SLIDE 2: App Structure -->
+    <div class="slide">
+        <h1>🏗️ Application Structure</h1>
+        <h2>Navigation & Layout Overview</h2>
+
+        <img src="file:///Users/christianvidalwolf/.gemini/antigravity/brain/6febf01b-1938-4a93-af99-97c309582cd2/top_filter_bar_details_1768921874047.png"
+            alt="App Structure">
+
+        <div class="grid-2">
+            <div>
+                <h3>Header Components:</h3>
+                <ul>
+                    <li><span class="badge">Logo</span> CrazeAnalytix branding</li>
+                    <li><span class="badge green">Live Sync</span> Real-time data status indicator</li>
+                    <li><span class="badge">Data Settings</span> Source configuration</li>
+                    <li><span class="badge">Navigation</span> Dashboard | Grid | Movers</li>
+                </ul>
+            </div>
+            <div>
+                <h3>Global Filter Bar:</h3>
+                <ul>
+                    <li><strong>Customer</strong> - Amazon marketplace selection</li>
+                    <li><strong>Year</strong> - Time period (2024-2026)</li>
+                    <li><strong>Month / Week</strong> - Granular time filters</li>
+                    <li><strong>Product Line / SKU / Title / ASIN</strong> - Product filters</li>
+                </ul>
+            </div>
+        </div>
+    </div>
+
+    <!-- SLIDE 3: Dashboard Overview -->
+    <div class="slide">
+        <h1>📊 Tab 1: Dashboard</h1>
+        <h2>High-Level Performance Overview</h2>
+
+        <img src="file:///Users/christianvidalwolf/.gemini/antigravity/brain/6febf01b-1938-4a93-af99-97c309582cd2/dashboard_overview_1768920783550.png"
+            alt="Dashboard Overview" class="large">
+
+        <p>The Dashboard provides an <strong>executive-level snapshot</strong> of overall business health, featuring key
+            performance indicators, revenue breakdowns, and trend analysis at a glance.</p>
+    </div>
+
+    <!-- SLIDE 4: Dashboard KPIs -->
+    <div class="slide">
+        <h1>📈 Dashboard: KPI Cards</h1>
+        <h2>Real-Time Performance Metrics</h2>
+
+        <div class="grid-2">
+            <div class="card">
+                <h3>💰 Sell Out Revenue</h3>
+                <table>
+                    <tr>
+                        <th>Year</th>
+                        <th>Revenue</th>
+                        <th>YoY Change</th>
+                    </tr>
+                    <tr>
+                        <td>2026</td>
+                        <td class="highlight">€304.723,14</td>
+                        <td class="highlight">+30.0%</td>
+                    </tr>
+                    <tr>
+                        <td>2025</td>
+                        <td>€6.895.382,51</td>
+                        <td>+16.4%</td>
+                    </tr>
+                    <tr>
+                        <td>2024</td>
+                        <td>€7.697.655,55</td>
+                        <td>-</td>
+                    </tr>
+                </table>
+                <p>Total revenue with automatic year-over-year percentage calculation</p>
+            </div>
+            <div class="card">
+                <h3>📦 Units Sold</h3>
+                <table>
+                    <tr>
+                        <th>Year</th>
+                        <th>Units</th>
+                        <th>YoY Change</th>
+                    </tr>
+                    <tr>
+                        <td>2026</td>
+                        <td class="highlight">45.010</td>
+                        <td class="highlight">+55.5%</td>
+                    </tr>
+                    <tr>
+                        <td>2025</td>
+                        <td>996.213</td>
+                        <td>+6.2%</td>
+                    </tr>
+                    <tr>
+                        <td>2024</td>
+                        <td>1.061.909</td>
+                        <td>-</td>
+                    </tr>
+                </table>
+                <p>Volume metrics with growth indicators</p>
+            </div>
+        </div>
+
+        <h3>Key Features:</h3>
+        <ul>
+            <li>✅ <strong>Color-coded growth</strong> - Green for positive, red for negative trends</li>
+            <li>✅ <strong>European number format</strong> - Dots as thousands separator (1.234,56)</li>
+            <li>✅ <strong>Real-time updates</strong> - Data refreshes when filters change</li>
+        </ul>
+    </div>
+
+    <!-- SLIDE 5: Dashboard Charts -->
+    <div class="slide">
+        <h1>📊 Dashboard: Revenue Charts</h1>
+        <h2>Product Line Breakdown</h2>
+
+        <div class="grid-2">
+            <div>
+                <h3>Revenue by Product Line</h3>
+                <p>Horizontal bar chart showing revenue contribution by product category:</p>
+                <ul>
+                    <li><strong>INKEE</strong> - Bath bombs and surprise toys</li>
+                    <li><strong>MAGIC PONYS</strong> - Collectible figures</li>
+                    <li><strong>ADVENT CALENDAR</strong> - Seasonal items</li>
+                    <li><strong>RINKATINK TOY MAGIC</strong> - Educational toys</li>
+                    <li><strong>GALLERY TOY'S MAGIC</strong> - Premium toys</li>
+                </ul>
+
+                <blockquote>Toggle between <strong>Sell Out (€)</strong> and <strong>Units</strong> using the buttons
+                    above the chart</blockquote>
+            </div>
+            <div>
+                <h3>Units by Product Line (Overview)</h3>
+                <p>Multi-year comparison bar chart showing:</p>
+                <ul>
+                    <li>📊 <strong>2024</strong> - Historical baseline (pink)</li>
+                    <li>📊 <strong>2025</strong> - Previous year (purple)</li>
+                    <li>📊 <strong>2026</strong> - Current year (blue)</li>
+                </ul>
+                <p>Enables quick identification of:</p>
+                <ul>
+                    <li>Products with growing demand</li>
+                    <li>Products losing market share</li>
+                    <li>Seasonal patterns across years</li>
+                </ul>
+            </div>
+        </div>
+    </div>
+
+    <!-- SLIDE 6: Dashboard Growth Tables -->
+    <div class="slide">
+        <h1>📈 Dashboard: Growth & Decline Analysis</h1>
+        <h2>Top Performers & Problem Areas</h2>
+
+        <img src="file:///Users/christianvidalwolf/.gemini/antigravity/brain/6febf01b-1938-4a93-af99-97c309582cd2/dashboard_growth_decline_tables_1768921516265.png"
+            alt="Growth Tables">
+
+        <div class="grid-2">
+            <div class="card">
+                <h3>✅ Fastest Growing Lines</h3>
+                <ul>
+                    <li>Shows top 5 product lines by revenue growth</li>
+                    <li>Displays <strong>€ difference</strong> (absolute change)</li>
+                    <li>Shows <strong>% change</strong> year-over-year</li>
+                    <li>Identifies products driving business growth</li>
+                </ul>
+            </div>
+            <div class="card">
+                <h3>❌ Declining Lines</h3>
+                <ul>
+                    <li>Highlights products with negative growth</li>
+                    <li>Sorted by largest revenue decline</li>
+                    <li class="warning">Alerts management to problem areas</li>
+                    <li>Enables proactive inventory decisions</li>
+                </ul>
+            </div>
+        </div>
+    </div>
+
+    <!-- SLIDE 7: Grid Tab Overview -->
+    <div class="slide">
+        <h1>📋 Tab 2: Grid</h1>
+        <h2>Detailed Data Analysis & Export</h2>
+
+        <img src="file:///Users/christianvidalwolf/.gemini/antigravity/brain/6febf01b-1938-4a93-af99-97c309582cd2/grid_tab_details_1768920927843.png"
+            alt="Grid Tab" class="large">
+
+        <p>The Grid tab provides <strong>granular access to all sales data</strong> with powerful filtering, grouping,
+            sorting, and export capabilities for detailed analysis.</p>
+    </div>
+
+    <!-- SLIDE 8: Grid Weekly Chart -->
+    <div class="slide">
+        <h1>📈 Grid: Weekly Sales Comparison</h1>
+        <h2>52-Week Trend Analysis</h2>
+
+        <h3>Interactive Line Chart Features:</h3>
+        <div class="grid-2">
+            <div>
+                <ul class="feature-list">
+                    <li>📊 <strong>Sell Out 2024</strong> - Pink line showing historical revenue</li>
+                    <li>📊 <strong>Sell Out 2025</strong> - Red line for previous year</li>
+                    <li>📊 <strong>Sell Out 2026</strong> - Green line for current year</li>
+                </ul>
+            </div>
+            <div>
+                <ul class="feature-list">
+                    <li>📦 <strong>Units 2024</strong> - Blue dashed line</li>
+                    <li>📦 <strong>Units 2025</strong> - Cyan dashed line</li>
+                    <li>📦 <strong>Units 2026</strong> - Teal dashed line</li>
+                </ul>
+            </div>
+        </div>
+
+        <h3>Use Cases:</h3>
+        <ul>
+            <li>🎄 <strong>Peak Detection</strong> - Identify Christmas, Easter, and back-to-school spikes</li>
+            <li>📉 <strong>Low Season Analysis</strong> - Plan inventory for slow periods</li>
+            <li>📅 <strong>Week-by-Week Comparison</strong> - See exact performance differences</li>
+            <li>🔍 <strong>Hover Tooltips</strong> - Get precise values for any data point</li>
+        </ul>
+    </div>
+
+    <!-- SLIDE 9: Grid Data Table -->
+    <div class="slide">
+        <h1>📋 Grid: Interactive Data Table</h1>
+        <h2>Complete Sales Data Access</h2>
+
+        <h3>Table Structure:</h3>
+        <table>
+            <tr>
+                <th>Column</th>
+                <th>Description</th>
+                <th>Sortable</th>
+            </tr>
+            <tr>
+                <td><strong>Product Line</strong></td>
+                <td>Product category (INKEE, MAGIC PONYS, etc.)</td>
+                <td>✅</td>
+            </tr>
+            <tr>
+                <td><strong>Customer</strong></td>
+                <td>Amazon marketplace (Pan-EU, UK, SC)</td>
+                <td>✅</td>
+            </tr>
+            <tr>
+                <td><strong>SKU</strong></td>
+                <td>Stock Keeping Unit identifier</td>
+                <td>✅</td>
+            </tr>
+            <tr>
+                <td><strong>Title</strong></td>
+                <td>Product name</td>
+                <td>✅</td>
+            </tr>
+            <tr>
+                <td><strong>Sell Out 2024</strong></td>
+                <td>Revenue previous year</td>
+                <td>✅</td>
+            </tr>
+            <tr>
+                <td><strong>Sell Out 2025</strong></td>
+                <td>Revenue last year with YoY %</td>
+                <td>✅</td>
+            </tr>
+            <tr>
+                <td><strong>Sell Out 2026</strong></td>
+                <td>Revenue current year with YoY %</td>
+                <td>✅</td>
+            </tr>
+            <tr>
+                <td><strong>Units (2024-2026)</strong></td>
+                <td>Volume metrics per year</td>
+                <td>✅</td>
+            </tr>
+        </table>
+
+        <blockquote>Click any column header to sort ascending/descending. Click again to reverse sort order.
+        </blockquote>
+    </div>
+
+    <!-- SLIDE 10: Grid Pan-EU Grouping -->
+    <div class="slide">
+        <h1>🌍 Grid: Pan-EU Grouping Feature</h1>
+        <h2>Unified European Market View</h2>
+
+        <h3>How It Works:</h3>
+        <div class="grid-2">
+            <div class="card">
+                <h3>🔹 No Country Filter Applied</h3>
+                <p>When viewing all data without customer filter:</p>
+                <ul>
+                    <li><strong>Pan-EU</strong> = DE + IT + FR + ES combined</li>
+                    <li><strong>Amazon UK</strong> = United Kingdom only</li>
+                    <li><strong>Amazon SC</strong> = Seller Central only</li>
+                </ul>
+                <p class="highlight">Perfect for European market overview</p>
+            </div>
+            <div class="card">
+                <h3>🔸 Country Filter Applied</h3>
+                <p>When selecting a specific country:</p>
+                <ul>
+                    <li>Pan-EU grouping is <strong>disabled</strong></li>
+                    <li>Shows individual country data only</li>
+                    <li>Enables deep-dive into specific markets</li>
+                </ul>
+                <p>Example: Filter "Amazon DE" → See only Germany</p>
+            </div>
+        </div>
+
+        <blockquote>This feature eliminates the need for manual Excel grouping and saves hours of work monthly.
+        </blockquote>
+    </div>
+
+    <!-- SLIDE 11: Grid Group By -->
+    <div class="slide">
+        <h1>🔧 Grid: Group By Options</h1>
+        <h2>Dynamic Data Aggregation</h2>
+
+        <img src="file:///Users/christianvidalwolf/.gemini/antigravity/brain/6febf01b-1938-4a93-af99-97c309582cd2/grid_group_by_options_1768921782657.png"
+            alt="Group By Options">
+
+        <h3>Available Grouping Dimensions:</h3>
+        <div class="grid-2">
+            <div>
+                <ul>
+                    <li><span class="badge">1</span> <strong>Product Line</strong> - Group by brand/category</li>
+                    <li><span class="badge">2</span> <strong>Customer</strong> - Group by marketplace</li>
+                    <li><span class="badge">3</span> <strong>SKU</strong> - Group by product code</li>
+                </ul>
+            </div>
+            <div>
+                <ul>
+                    <li><span class="badge">4</span> <strong>Title</strong> - Group by product name</li>
+                    <li><span class="badge">5</span> <strong>ASIN</strong> - Group by Amazon ID</li>
+                    <li><span class="badge orange">Multi</span> Up to 4 dimensions simultaneously</li>
+                </ul>
+            </div>
+        </div>
+
+        <h3>Example Combinations:</h3>
+        <ul>
+            <li>📊 <strong>Customer → Product Line</strong> - See which product lines sell best in each market</li>
+            <li>📊 <strong>Product Line → SKU</strong> - Drill down from category to individual products</li>
+            <li>📊 <strong>Title only</strong> - Aggregate all variations of a product</li>
+        </ul>
+    </div>
+
+    <!-- SLIDE 12: Grid Filter Rows -->
+    <div class="slide">
+        <h1>🔍 Grid: Advanced Row Filtering</h1>
+        <h2>Precision Data Selection</h2>
+
+        <img src="file:///Users/christianvidalwolf/.gemini/antigravity/brain/6febf01b-1938-4a93-af99-97c309582cd2/grid_filter_options_1768921719013.png"
+            alt="Filter Options">
+
+        <h3>Filter Capabilities:</h3>
+        <table>
+            <tr>
+                <th>Metric</th>
+                <th>Operators Available</th>
+                <th>Example Use</th>
+            </tr>
+            <tr>
+                <td>Sell Out 2025</td>
+                <td>≥, ≤, =, ≠, contains</td>
+                <td>Find products with €10,000+ revenue</td>
+            </tr>
+            <tr>
+                <td>Sell Out 2026</td>
+                <td>≥, ≤, =, ≠, contains</td>
+                <td>Filter current year high performers</td>
+            </tr>
+            <tr>
+                <td>Units 2025</td>
+                <td>≥, ≤, =, ≠, contains</td>
+                <td>Find products selling 500+ units</td>
+            </tr>
+            <tr>
+                <td>Units 2026</td>
+                <td>≥, ≤, =, ≠, contains</td>
+                <td>Current volume analysis</td>
+            </tr>
+            <tr>
+                <td>% YoY Growth</td>
+                <td>≥, ≤, positive, negative</td>
+                <td>Find products growing 20%+</td>
+            </tr>
+        </table>
+    </div>
+
+    <!-- SLIDE 13: Grid Filtered Totals -->
+    <div class="slide">
+        <h1>📊 Grid: Filtered Totals Summary</h1>
+        <h2>Real-Time Aggregation</h2>
+
+        <h3>Summary Bar Components:</h3>
+        <div class="grid-2">
+            <div class="card">
+                <h3>2026 Totals</h3>
+                <ul>
+                    <li>💰 <strong>€304.723</strong> total filtered revenue</li>
+                    <li>📦 <strong>45.010</strong> total filtered units</li>
+                    <li>📈 <strong>+84.8%</strong> YoY growth indicator</li>
+                </ul>
+            </div>
+            <div class="card">
+                <h3>2025 Totals</h3>
+                <ul>
+                    <li>💰 <strong>€6.895.383</strong> revenue</li>
+                    <li>📦 <strong>996.213</strong> units</li>
+                    <li>📈 <strong>+16.4%</strong> vs 2024</li>
+                </ul>
+            </div>
+        </div>
+
+        <h3>Dynamic Updates:</h3>
+        <ul>
+            <li>✅ Totals update <strong>instantly</strong> when filters are applied</li>
+            <li>✅ Shows aggregate of <strong>visible rows only</strong></li>
+            <li>✅ Enables quick <strong>"what-if" analysis</strong> - filter by product line and see total impact</li>
+            <li>✅ Row counter shows <strong>"Showing X of Y rows"</strong></li>
+        </ul>
+    </div>
+
+    <!-- SLIDE 14: Grid Export -->
+    <div class="slide">
+        <h1>📥 Grid: CSV Export</h1>
+        <h2>Data Download for External Analysis</h2>
+
+        <h3>Export Features:</h3>
+        <div class="grid-2">
+            <div>
+                <ul class="feature-list">
+                    <li>📄 <strong>Export CSV</strong> button in top-right</li>
+                    <li>📊 Downloads <strong>currently filtered view</strong></li>
+                    <li>📋 Includes all visible columns</li>
+                    <li>🔢 Numbers in European format</li>
+                </ul>
+            </div>
+            <div>
+                <ul class="feature-list">
+                    <li>📎 Ready for Excel/Google Sheets</li>
+                    <li>📧 Perfect for email reports</li>
+                    <li>📈 Import into other BI tools</li>
+                    <li>💾 Local backup of filtered data</li>
+                </ul>
+            </div>
+        </div>
+
+        <h3>Use Cases:</h3>
+        <ul>
+            <li>📊 Export product line data for quarterly presentations</li>
+            <li>📧 Share filtered views with non-app users via email</li>
+            <li>📈 Combine with advertising data in Excel for ROAS analysis</li>
+            <li>💼 Prepare board reports with selected metrics</li>
+        </ul>
+    </div>
+
+    <!-- SLIDE 15: Movers Tab Overview -->
+    <div class="slide">
+        <h1>🚀 Tab 3: Movers</h1>
+        <h2>Growth Analytics & SKU Performance</h2>
+
+        <img src="file:///Users/christianvidalwolf/.gemini/antigravity/brain/6febf01b-1938-4a93-af99-97c309582cd2/movers_tab_gainers_1768921014485.png"
+            alt="Movers Tab" class="large">
+
+        <p>The Movers tab identifies <strong>the fastest growing and fastest declining SKUs</strong>, enabling quick
+            action on top performers and problem products.</p>
+    </div>
+
+    <!-- SLIDE 16: Movers Features -->
+    <div class="slide">
+        <h1>📈 Movers: Feature Breakdown</h1>
+        <h2>Analytics Overview</h2>
+
+        <h3>Control Panel:</h3>
+        <div class="grid-2">
+            <div class="card">
+                <h3>🔀 Movement Toggles</h3>
+                <ul>
+                    <li><span class="badge green">Top Gainers</span> Products with highest growth</li>
+                    <li><span class="badge warning">Top Losers</span> Products with biggest decline</li>
+                </ul>
+            </div>
+            <div class="card">
+                <h3>📊 Metric Selection</h3>
+                <ul>
+                    <li><span class="badge">Sell Out €</span> Analyze by revenue</li>
+                    <li><span class="badge">Units</span> Analyze by volume</li>
+                </ul>
+            </div>
+        </div>
+
+        <h3>Leaderboard Columns:</h3>
+        <table>
+            <tr>
+                <th>Column</th>
+                <th>Description</th>
+            </tr>
+            <tr>
+                <td><strong>Rank</strong></td>
+                <td>Position in top 20 (1-20)</td>
+            </tr>
+            <tr>
+                <td><strong>SKU Details</strong></td>
+                <td>Product name with SKU code</td>
+            </tr>
+            <tr>
+                <td><strong>Product Line</strong></td>
+                <td>Category/brand</td>
+            </tr>
+            <tr>
+                <td><strong>2025</strong></td>
+                <td>Previous year value (€ or units)</td>
+            </tr>
+            <tr>
+                <td><strong>2026</strong></td>
+                <td>Current year value</td>
+            </tr>
+            <tr>
+                <td><strong>Diff</strong></td>
+                <td>Absolute difference (€ or units)</td>
+            </tr>
+            <tr>
+                <td><strong>% Change</strong></td>
+                <td class="highlight">Year-over-year growth percentage</td>
+            </tr>
+        </table>
+    </div>
+
+    <!-- SLIDE 17: Movers Examples -->
+    <div class="slide">
+        <h1>🏆 Movers: Real Examples</h1>
+        <h2>Top Gainers Analysis</h2>
+
+        <h3>Sample Top Gainers (Units):</h3>
+        <table>
+            <tr>
+                <th>Rank</th>
+                <th>Product</th>
+                <th>Line</th>
+                <th>2025</th>
+                <th>2026</th>
+                <th>+/-</th>
+                <th>%</th>
+            </tr>
+            <tr>
+                <td>1</td>
+                <td>MAGIC PONYS - School Of Magic</td>
+                <td>MAGIC PONYS</td>
+                <td>€478</td>
+                <td>€715</td>
+                <td class="highlight">+€237</td>
+                <td class="highlight">+71.4%</td>
+            </tr>
+            <tr>
+                <td>2</td>
+                <td>INKEE - Surprise XXL Bath Bomb</td>
+                <td>INKEE</td>
+                <td>€438</td>
+                <td>€522</td>
+                <td class="highlight">+€84</td>
+                <td class="highlight">+19.2%</td>
+            </tr>
+            <tr>
+                <td>3</td>
+                <td>INKEE - Surprise Bath Bomb Rescue</td>
+                <td>INKEE</td>
+                <td>€17</td>
+                <td>€83</td>
+                <td class="highlight">+€66</td>
+                <td class="highlight">+400%</td>
+            </tr>
+        </table>
+
+        <h3>Insights Enabled:</h3>
+        <ul>
+            <li>🏆 Quickly identify which SKUs are driving growth</li>
+            <li>📦 Prioritize inventory replenishment for top performers</li>
+            <li>💡 Inform marketing budget allocation</li>
+            <li>🎯 Focus sales efforts on winning products</li>
+        </ul>
+    </div>
+
+    <!-- SLIDE 18: Data Settings -->
+    <div class="slide">
+        <h1>⚙️ Data Settings</h1>
+        <h2>Source Configuration & Sync Management</h2>
+
+        <img src="file:///Users/christianvidalwolf/.gemini/antigravity/brain/6febf01b-1938-4a93-af99-97c309582cd2/data_settings_modal_1768921607972.png"
+            alt="Data Settings Modal">
+
+        <div class="grid-2">
+            <div class="card">
+                <h3>☁️ Cloud Sync</h3>
+                <ul>
+                    <li><span class="badge green">Live Sync</span> Active connection to Dropbox</li>
+                    <li>🔄 <strong>Sync Now</strong> - Manual refresh button</li>
+                    <li>⏰ <strong>Auto-refresh</strong> - Daily at 7:00 AM</li>
+                </ul>
+            </div>
+            <div class="card">
+                <h3>📂 Local Uploads</h3>
+                <ul>
+                    <li>📊 <strong>Sales CSV</strong> - Main sales data file</li>
+                    <li>📣 <strong>Ads CSV</strong> - Advertising expenses data</li>
+                    <li>📎 Drag-and-drop supported</li>
+                </ul>
+            </div>
+        </div>
+    </div>
+
+    <!-- SLIDE 19: Automation Flow -->
+    <div class="slide">
+        <h1>🔄 Data Automation</h1>
+        <h2>End-to-End Data Pipeline</h2>
+
+        <div class="flow-diagram">
+            ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐
+            │ Master CSV │────▶│ Dropbox │────▶│ API Proxy │────▶│ CrazeAnalytix │
+            │ (Updated by │ │ (Cloud Host) │ │ (/api/fetch) │ │ (Dashboard) │
+            │ team) │ │ │ │ │ │ │
+            └─────────────────┘ └─────────────────┘ └─────────────────┘ └─────────────────┘
+            │
+            ▼
+            ┌─────────────────┐
+            │ IndexedDB │
+            │ (Local Cache) │
+            └─────────────────┘
+        </div>
+
+        <table>
+            <tr>
+                <th>Feature</th>
+                <th>Description</th>
+                <th>Benefit</th>
+            </tr>
+            <tr>
+                <td>🔄 Daily Sync</td>
+                <td>Automatic fetch at 7:00 AM</td>
+                <td>Always fresh data</td>
+            </tr>
+            <tr>
+                <td>💾 Local Cache</td>
+                <td>IndexedDB storage</td>
+                <td>Fast loading, offline support</td>
+            </tr>
+            <tr>
+                <td>🔗 Live Indicator</td>
+                <td>Green dot in header</td>
+                <td>Connection status visibility</td>
+            </tr>
+            <tr>
+                <td>⚡ Manual Refresh</td>
+                <td>Sync Now button</td>
+                <td>Immediate updates when needed</td>
+            </tr>
+        </table>
+    </div>
+
+    <!-- SLIDE 20: Number Formatting -->
+    <div class="slide">
+        <h1>🇪🇺 European Number Formatting</h1>
+        <h2>Regional Display Standards</h2>
+
+        <p>All numerical values throughout the application use <strong>European formatting standards</strong> for
+            consistency with local business practices.</p>
+
+        <div class="grid-2">
+            <div class="card">
+                <h3>Format Rules</h3>
+                <table>
+                    <tr>
+                        <th>Element</th>
+                        <th>Character</th>
+                    </tr>
+                    <tr>
+                        <td>Thousands separator</td>
+                        <td class="highlight">. (period)</td>
+                    </tr>
+                    <tr>
+                        <td>Decimal separator</td>
+                        <td class="highlight">, (comma)</td>
+                    </tr>
+                    <tr>
+                        <td>Currency symbol</td>
+                        <td class="highlight">€ (before)</td>
+                    </tr>
+                </table>
+            </div>
+            <div class="card">
+                <h3>Examples</h3>
+                <table>
+                    <tr>
+                        <th>Value</th>
+                        <th>Display</th>
+                    </tr>
+                    <tr>
+                        <td>1234.56</td>
+                        <td class="highlight">€1.234,56</td>
+                    </tr>
+                    <tr>
+                        <td>1000000</td>
+                        <td class="highlight">1.000.000</td>
+                    </tr>
+                    <tr>
+                        <td>6895382.51</td>
+                        <td class="highlight">€6.895.382,51</td>
+                    </tr>
+                </table>
+            </div>
+        </div>
+
+        <h3>Applied Throughout:</h3>
+        <ul>
+            <li>✅ Dashboard KPI cards</li>
+            <li>✅ Grid table cells</li>
+            <li>✅ Movers leaderboard</li>
+            <li>✅ Chart tooltips</li>
+            <li>✅ Filtered totals summary</li>
+            <li>✅ CSV exports</li>
+        </ul>
+    </div>
+
+    <!-- SLIDE 21: Business Benefits -->
+    <div class="slide">
+        <h1>💼 Business Benefits</h1>
+        <h2>ROI & Operational Improvements</h2>
+
+        <div class="grid-2">
+            <div class="card">
+                <h3>⏱️ Time Savings</h3>
+                <ul>
+                    <li><strong>Before:</strong> 4+ hours/week Excel consolidation</li>
+                    <li><strong>After:</strong> Instant, automatic updates</li>
+                    <li class="highlight">Estimated: 16+ hours/month saved</li>
+                </ul>
+            </div>
+            <div class="card">
+                <h3>📊 Better Decisions</h3>
+                <ul>
+                    <li>Real-time visibility into trends</li>
+                    <li>Quick identification of problems</li>
+                    <li class="highlight">Data-driven inventory management</li>
+                </ul>
+            </div>
+            <div class="card">
+                <h3>🌍 Unified View</h3>
+                <ul>
+                    <li>6 Amazon markets in one place</li>
+                    <li>Pan-EU grouping for Europe overview</li>
+                    <li class="highlight">No more switching between reports</li>
+                </ul>
+            </div>
+            <div class="card">
+                <h3>👥 Team Collaboration</h3>
+                <ul>
+                    <li>Shared access via web URL</li>
+                    <li>No software installation required</li>
+                    <li class="highlight">Everyone sees the same data</li>
+                </ul>
+            </div>
+        </div>
+    </div>
+
+    <!-- SLIDE 22: Access Information -->
+    <div class="slide">
+        <h1>🔗 Access & Requirements</h1>
+        <h2>How to Use CrazeAnalytix</h2>
+
+        <div class="grid-2">
+            <div class="card">
+                <h3>🌐 URLs</h3>
+                <table>
+                    <tr>
+                        <th>Environment</th>
+                        <th>URL</th>
+                    </tr>
+                    <tr>
+                        <td><strong>Production</strong></td>
+                        <td>https://crazeanalytix.vercel.app</td>
+                    </tr>
+                    <tr>
+                        <td><strong>Development</strong></td>
+                        <td>http://localhost:3000</td>
+                    </tr>
+                </table>
+            </div>
+            <div class="card">
+                <h3>💻 Requirements</h3>
+                <ul>
+                    <li>🌐 Modern web browser (Chrome, Firefox, Safari, Edge)</li>
+                    <li>📱 Works on desktop and tablet</li>
+                    <li>🔒 No login required</li>
+                    <li>⚡ Internet connection for data sync</li>
+                </ul>
+            </div>
+        </div>
+
+        <h3>Technical Stack:</h3>
+        <ul>
+            <li>⚛️ <strong>React + TypeScript</strong> - Modern frontend framework</li>
+            <li>☁️ <strong>Vercel</strong> - Cloud hosting with global CDN</li>
+            <li>📦 <strong>Dropbox API</strong> - Cloud data storage</li>
+            <li>💾 <strong>IndexedDB</strong> - Local caching for performance</li>
+        </ul>
+    </div>
+
+    <!-- SLIDE 23: Summary -->
+    <div class="slide title-slide">
+        <h1>✨ Summary</h1>
+        <h2>CrazeAnalytix Key Takeaways</h2>
+
+        <ul style="text-align: left; max-width: 650px; margin-top: 25px;">
+            <li>1️⃣ <strong>Dashboard</strong> - Executive overview with KPIs, charts, and growth tables</li>
+            <li>2️⃣ <strong>Grid</strong> - Detailed data with Pan-EU grouping, filtering, and CSV export</li>
+            <li>3️⃣ <strong>Movers</strong> - Top 20 gainers and losers by SKU performance</li>
+            <li>4️⃣ <strong>8 Global Filters</strong> - Customer, Year, Month, Week, Line, SKU, Title, ASIN</li>
+            <li>5️⃣ <strong>Automatic Sync</strong> - Daily updates from Dropbox at 7:00 AM</li>
+            <li>6️⃣ <strong>European Format</strong> - Numbers displayed as 1.234,56</li>
+            <li>7️⃣ <strong>No Installation</strong> - Access via web browser, no setup required</li>
+        </ul>
+
+        <p style="margin-top: 35px; color: #64748b;">Presentation generated: January 20, 2026</p>
+    </div>
+
+</body>
+
+</html>
\ No newline at end of file
diff --git a/services/dataProcessor.ts b/services/dataProcessor.ts
index b3386cd..63389af 100644
--- a/services/dataProcessor.ts
+++ b/services/dataProcessor.ts
@@ -509,6 +509,7 @@ export const mergeSalesAndAdsData = (salesData: SalesRecord[], adsData: AdsRecor
             marketplace: sale.customer,
             customer: sale.customer,
             month: sale.month,
+            week: sale.week || 0, // Preserve week info
             year: sale.year,
             asin: sale.asin,
             title: sale.title,
@@ -1252,4 +1253,58 @@ export const aggregateForComparisonTimeSeries = (data: SalesRecord[]): Compariso
             return Object.values(d).some(val => typeof val === 'number' && val > 0);
         })
         .sort((a, b) => a.week - b.week);
-};
\ No newline at end of file
+};
+export interface WeeklyPivotRow {
+    id: string;
+    sku: string;
+    title: string;
+    asin: string;
+    line: string;
+    customer: string;
+    unitsByWeek: { [weekKey: string]: number }; // Key: "YYYY-WW"
+}
+
+export const pivotWeeklySalesData = (data: CombinedKPIs[]): { 
+    rows: WeeklyPivotRow[], 
+    weeks: string[] 
+} => {
+    // 1. Identify all unique weeks and sort descending (YYYY-WW)
+    const weekKeys = new Set<string>();
+    data.forEach(d => {
+        if (d.week) {
+            const weekKey = `${d.year}-${String(d.week).padStart(2, '0')}`;
+            weekKeys.add(weekKey);
+        }
+    });
+    const sortedWeeks = Array.from(weekKeys).sort((a, b) => b.localeCompare(a));
+
+    const map = new Map<string, WeeklyPivotRow>();
+
+    data.forEach(record => {
+        const key = record.sku || record.asin || `${record.title}-${record.line}`;
+        if (!key) return;
+
+        if (!map.has(key)) {
+            map.set(key, {
+                id: key,
+                sku: record.sku || '',
+                title: record.title || '',
+                asin: record.asin || '',
+                line: record.line || '',
+                customer: record.customer || record.marketplace || '',
+                unitsByWeek: {}
+            });
+        }
+
+        const row = map.get(key)!;
+        if (record.week) {
+            const weekKey = `${record.year}-${String(record.week).padStart(2, '0')}`;
+            row.unitsByWeek[weekKey] = (row.unitsByWeek[weekKey] || 0) + record.unitsTotal;
+        }
+    });
+
+    return {
+        rows: Array.from(map.values()),
+        weeks: sortedWeeks
+    };
+};
diff --git a/types.ts b/types.ts
index f1a52cc..7386738 100644
--- a/types.ts
+++ b/types.ts
@@ -155,6 +155,7 @@ export interface CombinedKPIs {
   marketplace: string;
   customer: string; // Added for consistency with SalesRecord
   month: string;
+  week: number; // Added for weekly analysis
   year: number;
   asin: string;
   title: string;