加一个止损设计

老师好！我想将我的策略模型加一个止损设计，怎么加呢？谢谢！Params Numeric F1(10);// 短期指数平均线参数 Numeric F2(15);// 长期指数平均线参数 Numeric F3(21);// 短期指数平均线参数 Vars Series<Numeric> AvgValue1; Series<Numeric> AvgValue2; Series<Numeric> AvgValue3; Series<Numeric> AvgValue4;Events OnBar(ArrayRef<Integer> indexs) { AvgValue1 = AverageFC(Close,F1); AvgValue2 = AverageFC(Close,F2); AvgValue3 = AverageFC(Close,F3); PlotNumeric(\"MA1\",AvgValue1); PlotNumeric(\"MA2\",AvgValue2); PlotNumeric(\"MA3\",AvgValue3); If(MarketPosition ==0) { if(close[1] > AvgValue1[1]&&AvgValue1[1] > AvgValue2[1]&&AvgValue2[1] > AvgValue3[1]&&AvgValue1[1]>AvgValue1[2]&& AvgValue2[1]>AvgValue2[2]&&AvgValue3[1]>AvgValue3[2]) Buy(1,Open); if( close[1] <AvgValue1[1]&&AvgValue1[1] < AvgValue2[1]&&AvgValue2[1] < AvgValue3[1] &&AvgValue1[1]<AvgValue1[2]&&AvgValue2[1]<AvgValue2[2]&&AvgValue3[1]<AvgValue3[2]) SellShort(1,Open); } if(MarketPosition ==1) { if(close[1] < AvgValue1[1]&&AvgValue1[1] < AvgValue2[1]&&AvgValue2[1] < AvgValue3[1] &&AvgValue1[1]<AvgValue1[2]&&AvgValue2[1]<AvgValue2[2]&&AvgValue3[1]<AvgValue3[2]) Sell(1,open); } if(MarketPosition ==-1) { if(close[1] > AvgValue1[1]&&AvgValue1[1] > AvgValue2[1]&&AvgValue2[1] > AvgValue3[1] &&AvgValue1[1]>AvgValue1[2]&&AvgValue2[1]>AvgValue2[2]&&AvgValue3[1]>AvgValue3[2]) BuyToCover(1,open ); } }