diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 5239f74..5b1717f 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -2627,6 +2627,15 @@ See `POSITION_SCALING_ROADMAP.md` for planned position management optimizations:
 
 **Blocked Signals Tracking (Nov 11, 2025):** System now automatically saves all blocked signals to database for data-driven optimization. See `BLOCKED_SIGNALS_TRACKING.md` for SQL queries and analysis workflows.
 
+**Multi-Timeframe Data Collection (Nov 18, 2025):** Execute endpoint now supports parallel data collection across timeframes:
+- **5min signals:** Execute trades (production)
+- **15min/1H/4H/Daily signals:** Save to BlockedSignal table with `blockReason='DATA_COLLECTION_ONLY'`
+- Enables cross-timeframe performance comparison (which timeframe has best win rate?)
+- Zero financial risk - non-5min signals just collect data for future analysis
+- TradingView alerts on multiple timeframes → n8n passes `timeframe` field → bot routes accordingly
+- After 50+ trades: SQL analysis to determine optimal timeframe for live trading
+- Implementation: `app/api/trading/execute/route.ts` lines 106-145
+
 **Data-driven approach:** Each phase requires validation through SQL analysis before implementation. No premature optimization.
 
 **Signal Quality Version Tracking:** Database tracks `signalQualityVersion` field to compare algorithm performance: