Fix P&L calculation and signal flip detection

- Fix external closure P&L using tp1Hit flag instead of currentSize
- Add direction change detection to prevent false TP1 on signal flips
- Signal flips now recorded with accurate P&L as 'manual' exits
- Add retry logic with exponential backoff for Solana RPC rate limits
- Create /api/trading/cancel-orders endpoint for manual cleanup
- Improves data integrity for win/loss statistics

scripts/run_exit_analysis.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+# Run optimal exit analysis and save results
+# Usage: ./run_exit_analysis.sh
+
+OUTPUT_FILE="exit_analysis_results_$(date +%Y%m%d_%H%M%S).txt"
+
+echo "🔍 Running optimal exit level analysis..."
+echo "Results will be saved to: $OUTPUT_FILE"
+echo ""
+
+# Run the SQL analysis
+docker exec trading-bot-postgres psql -U postgres -d trading_bot_v4 -f scripts/analyze_optimal_exits.sql | tee "$OUTPUT_FILE"
+
+echo ""
+echo "✅ Analysis complete!"
+echo "📊 Results saved to: $OUTPUT_FILE"
+echo ""
+echo "Next steps:"
+echo "1. Review the output above"
+echo "2. Look for patterns in MFE/MAE distribution"
+echo "3. Check if quality score correlation is strong"
+echo "4. Decide on optimal TP1/TP2/SL levels"
+echo "5. Update config/trading.ts with new settings"