diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 16fcef3..face661 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -72,6 +72,22 @@
 - **Benefits:** Regime-agnostic (adapts to bull/bear automatically), asset-agnostic (SOL vs BTC different ATR), trend-strength adaptive (wider trail for strong trends)
 - **Note:** All UI displays dynamically calculate runner% as `100 - TAKE_PROFIT_1_SIZE_PERCENT`
 
+**Exit Reason Tracking (Nov 24, 2025 - TRAILING_SL Distinction):**
+- **Regular SL:** Stop loss hit before TP2 reached (initial stop loss or breakeven SL after TP1)
+- **TRAILING_SL:** Stop loss hit AFTER TP2 trigger when trailing stop is active (runner protection)
+- **Detection Logic:** 
+  * If `tp2Hit=true` AND `trailingStopActive=true` AND price pulled back from peak (>1%)
+  * Then `exitReason='TRAILING_SL'` (not regular 'SL')
+  * Distinguishes runner exits from early stops
+- **Database:** Both stored in same `exitReason` column, but TRAILING_SL separate value
+- **Analytics UI:** Trailing stops display with purple styling + 🏃 emoji, regular SL shows blue
+- **Purpose:** Analyze runner system performance separately from hard stop losses
+- **Code locations:** 
+  * Position Manager exit detection: `lib/trading/position-manager.ts` line ~937, ~1457
+  * External closure handler: `lib/trading/position-manager.ts` line ~927-945
+  * Frontend display: `app/analytics/page.tsx` line ~776-792
+- **Implementation:** Nov 24, 2025 (commit 9d7932f)
+
 **Per-Symbol Configuration:** SOL and ETH have independent enable/disable toggles and position sizing:
 - `SOLANA_ENABLED`, `SOLANA_POSITION_SIZE`, `SOLANA_LEVERAGE` (defaults: true, 100%, 15x)
 - `ETHEREUM_ENABLED`, `ETHEREUM_POSITION_SIZE`, `ETHEREUM_LEVERAGE` (defaults: true, 100%, 1x)