diff --git a/App.tsx b/App.tsx
index 731f517..b768c9b 100644
--- a/App.tsx
+++ b/App.tsx
@@ -65,6 +65,7 @@ const App: React.FC = () => {
   const [showCreateExperiment, setShowCreateExperiment] = useState(false);
   const [preselectedAsins, setPreselectedAsins] = useState<string[]>([]);
   const [preselectedMarketplace, setPreselectedMarketplace] = useState<string>('');
+  const [preselectedLine, setPreselectedLine] = useState<string>('');
 
   // Modal State
   const [isDataModalOpen, setIsDataModalOpen] = useState(false);
@@ -340,6 +341,14 @@ const App: React.FC = () => {
     setView('ads');
   }, []);
 
+  // Create experiment for a specific line
+  const handleCreateExperimentForLine = useCallback((line: string) => {
+    if (!line) return;
+    setPreselectedLine(line);
+    setPreselectedMarketplace(filters.customer[0] || '');
+    setShowCreateExperiment(true);
+  }, [filters.customer]);
+
   // 1. Initial Load from Cache (IndexedDB) or Auto-Fetch Permanent URL
   useEffect(() => {
     const initApp = async () => {
@@ -1034,12 +1043,14 @@ const App: React.FC = () => {
             setShowCreateExperiment(false);
             setPreselectedAsins([]);
             setPreselectedMarketplace('');
+            setPreselectedLine('');
           }}
           onSuccess={() => {
             handleExperimentsFetch();
           }}
           initialAsins={preselectedAsins}
           initialMarketplace={preselectedMarketplace}
+          initialLine={preselectedLine}
         />
       )}
 
diff --git a/components/ExperimentForm.tsx b/components/ExperimentForm.tsx
index 024e40f..75d0dc4 100644
--- a/components/ExperimentForm.tsx
+++ b/components/ExperimentForm.tsx
@@ -7,13 +7,15 @@ interface ExperimentFormProps {
   onSuccess: () => void;
   initialAsins?: string[];
   initialMarketplace?: string;
+  initialLine?: string;
 }
 
-const ExperimentForm: React.FC<ExperimentFormProps> = ({ 
-  onClose, 
+const ExperimentForm: React.FC<ExperimentFormProps> = ({
+  onClose,
   onSuccess,
   initialAsins = [],
-  initialMarketplace = 'DE'
+  initialMarketplace = 'DE',
+  initialLine = ''
 }) => {
   const [formData, setFormData] = useState<ExperimentCreateInput>({
     name: '',
@@ -31,6 +33,42 @@ const ExperimentForm: React.FC<ExperimentFormProps> = ({
 
   const [loading, setLoading] = useState(false);
   const [asinInput, setAsinInput] = useState('');
+  const [targetType, setTargetType] = useState<'asin' | 'line'>(initialAsins.length > 0 ? 'asin' : initialLine ? 'line' : 'asin');
+  const [selectedLine, setSelectedLine] = useState(initialLine);
+
+  // Get available product lines from localStorage (sales data)
+  const availableLines = useMemo(() => {
+    try {
+      const cachedData = localStorage.getItem('craze_sales_data');
+      if (cachedData) {
+        const data = JSON.parse(cachedData);
+        const lines = new Set(data.map((r: any) => r.line).filter(Boolean));
+        return Array.from(lines).sort();
+      }
+    } catch (e) {
+      console.error('Failed to load product lines:', e);
+    }
+    return [];
+  }, []);
+
+  const handleAddAsin = () => {
+    // Support both comma and space separated ASINs
+    const newAsins = asinInput
+      .split(/[\s,]+/)  // Split by space or comma
+      .map(a => a.trim().toUpperCase())
+      .filter(a => a.length > 0 && /^[A-Z0-9]{9,10}$/.test(a));  // Validate ASIN format
+    
+    const uniqueAsins = Array.from(new Set([...formData.asins, ...newAsins]));
+    setFormData({ ...formData, asins: uniqueAsins });
+    setAsinInput('');
+  };
+
+  const handleSelectLine = (line: string) => {
+    setSelectedLine(line);
+    // For line targeting, we don't pre-populate ASINs
+    // The backend will handle filtering by line
+    setFormData({ ...formData, asins: [`LINE:${line}`] });
+  };
 
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
@@ -62,13 +100,6 @@ const ExperimentForm: React.FC<ExperimentFormProps> = ({
     setAsinInput('');
   };
 
-  const handleRemoveAsin = (asinToRemove: string) => {
-    setFormData({
-      ...formData,
-      asins: formData.asins.filter(a => a !== asinToRemove),
-    });
-  };
-
   const typeOptions: { value: ExperimentType; label: string; icon: string }[] = [
     { value: 'pricing', label: 'Pricing', icon: '💰' },
     { value: 'advertising', label: 'Advertising', icon: '📢' },
@@ -153,51 +184,122 @@ const ExperimentForm: React.FC<ExperimentFormProps> = ({
             </div>
           </div>
 
-          {/* ASINs */}
+          {/* Target Type Selector */}
           <div>
-            <label className="block text-xs font-medium text-slate-300 mb-1">
-              Target ASINs <span className="text-red-400">*</span>
+            <label className="block text-xs font-medium text-slate-300 mb-2">
+              Target Type <span className="text-red-400">*</span>
             </label>
-            <div className="flex gap-2 mb-2">
-              <input
-                type="text"
-                value={asinInput}
-                onChange={(e) => setAsinInput(e.target.value)}
-                onKeyPress={(e) => e.key === 'Enter' && (e.preventDefault(), handleAddAsin())}
-                className="flex-1 bg-slate-800 border border-slate-600 rounded-lg px-3 py-1.5 text-sm text-white placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-indigo-500"
-                placeholder="ASINs (comma-separated)"
-              />
+            <div className="flex gap-2">
               <button
                 type="button"
-                onClick={handleAddAsin}
-                className="px-3 py-1.5 bg-slate-700 hover:bg-slate-600 text-white rounded-lg text-sm transition-colors"
+                onClick={() => {
+                  setTargetType('asin');
+                  setFormData({ ...formData, asins: [] });
+                  setSelectedLine('');
+                }}
+                className={`flex-1 px-3 py-2 rounded-lg text-xs font-bold border transition-all ${
+                  targetType === 'asin'
+                    ? 'bg-indigo-600/20 border-indigo-500 text-indigo-400'
+                    : 'bg-slate-800 border-slate-600 text-slate-400 hover:border-slate-500'
+                }`}
               >
-                Add
+                🎯 Specific ASINs
+              </button>
+              <button
+                type="button"
+                onClick={() => {
+                  setTargetType('line');
+                  setFormData({ ...formData, asins: [] });
+                  setAsinInput('');
+                }}
+                className={`flex-1 px-3 py-2 rounded-lg text-xs font-bold border transition-all ${
+                  targetType === 'line'
+                    ? 'bg-indigo-600/20 border-indigo-500 text-indigo-400'
+                    : 'bg-slate-800 border-slate-600 text-slate-400 hover:border-slate-500'
+                }`}
+              >
+                📦 Entire Product Line
               </button>
             </div>
-            {formData.asins.length > 0 && (
-              <div className="flex flex-wrap gap-1.5 p-2 bg-slate-800/50 border border-slate-700 rounded-lg max-h-20 overflow-y-auto">
-                {formData.asins.map((asin) => (
-                  <span
-                    key={asin}
-                    className="inline-flex items-center gap-1 px-2 py-1 bg-slate-700 border border-slate-600 rounded text-xs text-slate-300 font-mono"
-                  >
-                    {asin}
-                    <button
-                      type="button"
-                      onClick={() => handleRemoveAsin(asin)}
-                      className="text-slate-400 hover:text-red-400 transition-colors"
-                    >
-                      <svg className="w-3 h-3" fill="none" viewBox="0 0 24 24" strokeWidth={2} stroke="currentColor">
-                        <path strokeLinecap="round" strokeLinejoin="round" d="M6 18L18 6M6 6l12 12" />
-                      </svg>
-                    </button>
-                  </span>
-                ))}
-              </div>
-            )}
           </div>
 
+          {targetType === 'asin' ? (
+            /* ASIN Input */
+            <div>
+              <label className="block text-xs font-medium text-slate-300 mb-1">
+                ASINs <span className="text-red-400">*</span>
+              </label>
+              <div className="flex gap-2 mb-2">
+                <input
+                  type="text"
+                  value={asinInput}
+                  onChange={(e) => setAsinInput(e.target.value)}
+                  onKeyPress={(e) => e.key === 'Enter' && (e.preventDefault(), handleAddAsin())}
+                  className="flex-1 bg-slate-800 border border-slate-600 rounded-lg px-3 py-1.5 text-sm text-white placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-indigo-500"
+                  placeholder="Paste ASINs (space or comma separated)"
+                />
+                <button
+                  type="button"
+                  onClick={handleAddAsin}
+                  className="px-3 py-1.5 bg-slate-700 hover:bg-slate-600 text-white rounded-lg text-sm transition-colors"
+                >
+                  Add
+                </button>
+              </div>
+              {formData.asins.length > 0 && !formData.asins.some(a => a.startsWith('LINE:')) && (
+                <div className="flex flex-wrap gap-1.5 p-2 bg-slate-800/50 border border-slate-700 rounded-lg max-h-20 overflow-y-auto">
+                  {formData.asins.map((asin) => (
+                    <span
+                      key={asin}
+                      className="inline-flex items-center gap-1 px-2 py-1 bg-slate-700 border border-slate-600 rounded text-xs text-slate-300 font-mono"
+                    >
+                      {asin}
+                      <button
+                        type="button"
+                        onClick={() => {
+                          setFormData({
+                            ...formData,
+                            asins: formData.asins.filter(a => a !== asin)
+                          });
+                        }}
+                        className="text-slate-400 hover:text-red-400 transition-colors"
+                      >
+                        <svg className="w-3 h-3" fill="none" viewBox="0 0 24 24" strokeWidth={2} stroke="currentColor">
+                          <path strokeLinecap="round" strokeLinejoin="round" d="M6 18L18 6M6 6l12 12" />
+                        </svg>
+                      </button>
+                    </span>
+                  ))}
+                </div>
+              )}
+              <p className="text-[10px] text-slate-500 mt-1">
+                💡 Tip: Paste multiple ASINs separated by spaces or commas
+              </p>
+            </div>
+          ) : (
+            /* Product Line Input */
+            <div>
+              <label className="block text-xs font-medium text-slate-300 mb-1">
+                Product Line <span className="text-red-400">*</span>
+              </label>
+              <select
+                value={selectedLine}
+                onChange={(e) => handleSelectLine(e.target.value)}
+                className="w-full bg-slate-800 border border-slate-600 rounded-lg px-3 py-1.5 text-sm text-white focus:outline-none focus:ring-2 focus:ring-indigo-500"
+              >
+                <option value="">Select a product line...</option>
+                {availableLines.map((line) => (
+                  <option key={line} value={line}>{line}</option>
+                ))}
+              </select>
+              {selectedLine && (
+                <p className="text-[10px] text-emerald-400 mt-1">
+                  ✓ Will target all ASINs in <strong>{selectedLine}</strong>
+                </p>
+              )}
+            </div>
+          )}
+
           {/* Timeline */}
           <div className="grid grid-cols-2 gap-4">
             <div>