[求助][讨论]止损怎么写

     Numeric ATRs(1); //几倍ATR止盈
   Numeric ATRLength(5); //ATR周期

    ATRVal = AvgTrueRange(ATRLength);

//多头开仓时根据开仓BAR的ATR计算止盈价
      If(MarketPosition == 1 && BarsSinceEntry == 0)
      {
         MyExitPrice = EntryPrice + ATRVal * ATRs;
      }
           //多头平仓
      If(MarketPosition == 1 && BarsSinceEntry > 0 && Vol > 0)
      {
         //止盈出场
         If(High >= MyExitPrice)
         {
            SP(DefaultVol,Max(Open,MyExitPrice));
           
         }

老师麻烦写一下止损 ：多单开仓价-ATRVal*0.5

 来源:程序化99

 来源: WWW.CXH99.COM

Sup=REF(Low,1);