Add trailing stop to BO EA v5.1 — all 17 presets enabled

ApplyTrailingStop() runs every 5s on open positions: activates after
1000 pts (100 pips) of profit, trails SL 500 pts (50 pips) behind price.
SL only moves in the profitable direction, never backwards.

New inputs: InpUseTrailingStop, InpTrailStart, InpTrailStop (all presets
set to true/1000/500). EA version bumped 5.0 → 5.1.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bo-xauusd.set

@@ -28,6 +28,11 @@ ATRMultiplier=2.5
 InpUseStopLoss=true
 StopLoss=1500
 
+; === Trailing Stop ===
+InpUseTrailingStop=true
+InpTrailStart=1000
+InpTrailStop=500
+
 ; === Risk Management ===
 TRADE_RANGE=200
 LongLimit=0