feat: v10 SHORT momentum filter - ADX + Price Position based

- NEW v10 filter: ADX >= 23 + Price Position >= 60% (short at top)
- OR: Price Position <= 40% with Volume >= 2.0x (capitulation bounces)
- Data-driven: Winners avg ADX 26.9, losers avg ADX 20.7
- Blocks today's disaster: ADX 20.7, Price Pos 13.6% (both failed)
- Enables catching massive downtrends from range top
- Files: lib/trading/signal-quality.ts

Analysis showed:
- RSI 50+ SHORTs: 68.2% WR, +$29.88 profit (BEST performance)
- Real pattern: Strong trend (ADX 23+) + Top of range (60%+)
- v8 disasters: All had ADX < 23, shorting in weak trend chop

Nov 26, 2025

lib/trading/signal-quality.ts

@@ -124,24 +124,22 @@ export async function scoreSignalQuality(params: {
         reasons.push(`RSI overbought (${params.rsi.toFixed(1)})`)
       }
     } else { // short
+      // v10 (Nov 26, 2025): RSI is NOT a good SHORT filter!
+      // Data analysis of 95 SHORTs showed:
+      //   - Winning SHORTs: avg RSI 45.8 (HIGHER than losers!)
+      //   - Losing SHORTs: avg RSI 42.9
+      //   - RSI 50+: 68.2% WR, +$29.88 profit (BEST performance)
+      // RSI alone is counterintuitive for shorts - focus on ADX + price position instead
+      
+      // Give small bonus for typical short RSI range, but don't penalize high RSI
       if (params.rsi < 50 && params.rsi > 30) {
-        score += 10
+        score += 5
         reasons.push(`RSI supports short (${params.rsi.toFixed(1)})`)
       } else if (params.rsi < 30) {
         score -= 10
-        reasons.push(`RSI oversold (${params.rsi.toFixed(1)})`)
-      }
-      
-      // CRITICAL (Nov 25, 2025): Data-driven SHORT filter
-      // Analysis of 14 SHORT signals showed:
-      //   - All 4 disasters had RSI < 33 (avg RSI 28.3, lost -$665.70)
-      //   - All 2 winners had RSI >= 33 (RSI 33.9, 66.3, won +$59.37)
-      //   - RSI < 33 = shorting into oversold = catching falling knives
-      // This penalty drops quality below 80 threshold, blocking the signal
-      if (params.rsi < 33) {
-        score -= 25
-        reasons.push(`🚨 SHORT oversold trap: RSI ${params.rsi.toFixed(1)} < 33 → BLOCKING (-25 pts)`)
+        reasons.push(`RSI oversold - bounce risk (${params.rsi.toFixed(1)})`)
       }
+      // No penalty for RSI 50+ - data shows these are actually the best shorts!
     }
   }
 
@@ -199,6 +197,33 @@ export async function scoreSignalQuality(params: {
     reasons.push(`Volume breakout compensates for low ATR`)
   }
 
+  // v10 (Nov 26, 2025): SHORT-SPECIFIC MOMENTUM FILTER
+  // Data analysis of 95 SHORTs revealed the REAL pattern:
+  //   - Winners: ADX 26.9, Price Position 37.8-64.2% (shorting at top!)
+  //   - Losers: ADX 20-25, Price Position 13.6-38.4% (shorting in chop at bottom!)
+  //   - Today's disaster: ADX 20.7, Price Pos 13.6% = both failed filters
+  // 
+  // The winning formula: Catch shorts at the TOP with strong trend confirmation
+  if (params.direction === 'short') {
+    const hasStrongTrend = params.adx >= 23
+    const atTopOfRange = params.pricePosition >= 60
+    const atBottomWithVolume = params.pricePosition <= 40 && params.volumeRatio >= 2.0
+    
+    if (!hasStrongTrend) {
+      score -= 30
+      reasons.push(`🚨 v10: SHORT in weak trend (ADX ${params.adx.toFixed(1)} < 23) → HIGH CHOP RISK (-30 pts)`)
+    } else if (!atTopOfRange && !atBottomWithVolume) {
+      score -= 25
+      reasons.push(`🚨 v10: SHORT in mid-range (${params.pricePosition.toFixed(0)}%) without setup → TRAP ZONE (-25 pts)`)
+    } else if (atTopOfRange) {
+      score += 15
+      reasons.push(`✅ v10: SHORT at top of range (${params.pricePosition.toFixed(0)}%) with ADX ${params.adx.toFixed(1)} → IDEAL SETUP (+15 pts)`)
+    } else if (atBottomWithVolume) {
+      score += 10
+      reasons.push(`✅ v10: SHORT capitulation bounce (${params.pricePosition.toFixed(0)}%, vol ${params.volumeRatio.toFixed(2)}x) → VALID (+10 pts)`)
+    }
+  }
+
   // Signal frequency penalties (check database for recent signals)
   const frequencyPenalties = {
     overtrading: 0,