请教老师关于序列变量问题

(Highest(High,Weekday)-Close) > 2* atr20 加了这句 后，策略编译的时候提示 for if else中包含序列函数，可能存在逻辑错误，请问我这样编写会有问题吗？//空头止盈止损 For i =0 to GetArraySize(idl)-1 { atr20 = AvgTrueRange(20); If (Data[idl[i]].MarketPosition == -1 and Close > EntryPrice*1.03 And BarsSinceEntry > 0) //亏3%止损 { Data[idl[i]].BuyToCover(0,Close); } If (Data[idl[i]].MarketPosition == -1 and (close - Lowest(Low,Weekday)) > 2* atr20 And BarsSinceEntry > 0) //回撤2倍atr20出 { Data[idl[i]].BuyToCover(0,Close); } }