跟踪止盈

请问一下老师： 系统带的TrailStop 名称: 触发跟踪止盈 和下面的写法功能上有什么不同，核心区别是什么？If(MarketPosition==1 And BarsSinceEntry>0 And HighestAfterEntry>=EntryPrice*(1+TrailingStart/1000)) { If(Low <= HighestAfterEntry[1]-EntryPrice*TrailingStop/1000) { MyPrice = HighestAfterEntry[1]-EntryPrice*TrailingStop/1000; If(Open < MyPrice) MyPrice = Open; Sell(0,myprice); bOut = True; } } If(MarketPosition==-1 And BarsSinceEntry>0 And LowestAfterEntry<=EntryPrice*(1-TrailingStart/1000)) { If(High >= LowestAfterEntry[1] + EntryPrice*TrailingStop/1000) { MyPrice = LowestAfterEntry[1] + EntryPrice*TrailingStop/1000; If(Open > MyPrice) MyPrice = Open; BuyToCover(0,MyPrice); bOut = True; } }