Documented critical bug where runner trailing stop never activated after TP1:
- Symptom: Runner exposed to full reversal with static SL
- Real incident: 24 profit at risk, user forced manual close
- Root cause: External closure detected before TP2 price check
- Fix: Three-part solution with TP2 pre-check, diagnostics, exit reason detection
- Impact: Runner now fully autonomous with trailing protection
Also renumbered subsequent pitfalls 43→45, 44→46, etc. for consistency.
Commit: 55582a4 "critical: Fix runner trailing stop protection after TP1"
c4c5c84c24