diff --git a/components/ForecastView.tsx b/components/ForecastView.tsx
index 1e120f6..bd072f0 100644
--- a/components/ForecastView.tsx
+++ b/components/ForecastView.tsx
@@ -21,7 +21,6 @@ interface ForecastViewProps {
     stockMap?: Map<string, number>;
     stockFilter: string[];
     onStockFilterChange: (newFilters: string[]) => void;
-    customerFilters: string[];
     top50Mode: 'eu' | 'uk';
 }
 
@@ -47,9 +46,9 @@ const ForecastRow: React.FC<{
         }
     }
 
-    const monthlySales = activeMonths.map(m => item.monthlyData[m]?.units || 0);
-    const avgMonthly = monthlySales.reduce((a, b) => a + b, 0) / (activeMonths.length || 1);
-    const peakMonthly = Math.max(...monthlySales, 0);
+    const monthlySales = activeMonths.map(m => (item.monthlyData && item.monthlyData[m]?.units) || 0);
+    const avgMonthly = monthlySales.length > 0 ? monthlySales.reduce((a, b) => a + b, 0) / activeMonths.length : 0;
+    const peakMonthly = monthlySales.length > 0 ? Math.max(...monthlySales) : 0;
 
     return (
         <tr key={item.asin} className="hover:bg-indigo-500/5 transition-colors group">
@@ -76,21 +75,21 @@ const ForecastRow: React.FC<{
                 </div>
             </td>
             <td className="px-6 py-4 text-center">
-                <span className="text-sm font-black text-white">{item.actualUnits.toLocaleString('de-DE')}</span>
+                <span className="text-sm font-black text-white">{(item.actualUnits || 0).toLocaleString('de-DE')}</span>
             </td>
             <td className="px-6 py-4 text-center">
-                <span className="text-sm font-black text-emerald-400">{item.forecastUnits.toLocaleString('de-DE')}</span>
+                <span className="text-sm font-black text-emerald-400">{(item.forecastUnits || 0).toLocaleString('de-DE')}</span>
             </td>
             <td className="px-6 py-4 text-center">
                 <div className="flex flex-col items-center">
-                    <span className="text-sm font-black text-indigo-400">{Math.round(avgMonthly).toLocaleString('de-DE')}</span>
-                    <span className="text-[9px] text-slate-500 font-bold uppercase tracking-tighter">Peak: {Math.round(peakMonthly).toLocaleString('de-DE')}</span>
+                    <span className="text-sm font-black text-indigo-400">{(Math.round(avgMonthly) || 0).toLocaleString('de-DE')}</span>
+                    <span className="text-[9px] text-slate-500 font-bold uppercase tracking-tighter">Peak: {(Math.round(peakMonthly) || 0).toLocaleString('de-DE')}</span>
                 </div>
             </td>
             <td className="px-6 py-4">
                 <div className="h-10 w-full min-w-[120px]">
                     <ResponsiveContainer width="100%" height="100%">
-                        <BarChart data={activeMonths.map(m => ({ name: m, units: item.monthlyData[m]?.units || 0 }))}>
+                        <BarChart data={activeMonths.map(m => ({ name: m, units: (item.monthlyData && item.monthlyData[m]?.units) || 0 }))}>
                             <Bar dataKey="units" fill="#6366f1" radius={[2, 2, 0, 0]} />
                         </BarChart>
                     </ResponsiveContainer>
@@ -113,7 +112,7 @@ const ForecastRow: React.FC<{
     );
 });
 
-const ForecastView: React.FC<ForecastViewProps> = ({ data, filters, top50Ranking, stockMap, stockFilter, onStockFilterChange, customerFilters, top50Mode }) => {
+const ForecastView: React.FC<ForecastViewProps> = ({ data, filters, top50Ranking, stockMap, stockFilter, onStockFilterChange, top50Mode }) => {
     const [searchTerm, setSearchTerm] = useState('');
     const [showOnlyTop50, setShowOnlyTop50] = useState(false);
     const [displayCount, setDisplayCount] = useState(50);
@@ -184,14 +183,14 @@ const ForecastView: React.FC<ForecastViewProps> = ({ data, filters, top50Ranking
                         <div className="p-2 bg-indigo-500/20 rounded-lg"><ChartIcon /></div>
                         <span className="text-[10px] font-black text-indigo-400 uppercase tracking-widest">Global Actuals</span>
                     </div>
-                    <div className="text-3xl font-black text-white tabular-nums">{globalSummary.actualUnits.toLocaleString('de-DE')}</div>
+                    <div className="text-3xl font-black text-white tabular-nums">{(globalSummary.actualUnits || 0).toLocaleString('de-DE')}</div>
                 </div>
                 <div className="bg-slate-900/50 backdrop-blur-xl border border-white/10 p-5 rounded-2xl shadow-xl">
                     <div className="flex items-center gap-3 mb-3">
                         <div className="p-2 bg-emerald-500/20 rounded-lg"><TrendingIcon /></div>
                         <span className="text-[10px] font-black text-emerald-400 uppercase tracking-widest">Global Forecast</span>
                     </div>
-                    <div className="text-3xl font-black text-emerald-400 tabular-nums">{globalSummary.forecastUnits.toLocaleString('de-DE')}</div>
+                    <div className="text-3xl font-black text-emerald-400 tabular-nums">{(globalSummary.forecastUnits || 0).toLocaleString('de-DE')}</div>
                 </div>
             </div>