Problem: When TP1 order fills on-chain and runner closes quickly,
Position Manager detects entire position gone but doesn't know TP1 filled.
Result: Marks trade as 'SL' instead of 'TP1', closes 100% instead of partial.
Root cause: Position Manager monitoring loop only knows about trade state
flags (tp1Hit), not actual Drift order fill history. When both TP1 and
runner close before next monitoring cycle, tp1Hit=false but position gone.
Fix: Use profit percentage to infer exit reason instead of trade flags
- Profit >1.2%: TP2 range
- Profit 0.3-1.2%: TP1 range
- Profit <0.3%: SL/breakeven range
Always calculate P&L on full originalPositionSize for external closures.
Exit reason logic determines what actually triggered based on P&L amount.
Example from Nov 19 08:40 CET trade:
- Entry $140.17, Exit $140.85 = 0.48% profit
- Old: Marked as 'SL' (tp1Hit=false, didn't know TP1 filled)
- New: Will mark as 'TP1' (profit in TP1 range)
Lines changed: lib/trading/position-manager.ts:760-835
de57c9634c