老师帮忙看看 总是编译不过，老师帮忙调整一下，谢谢

//------------------------------------------------------------------------// 简称: TrendStrategy//------------------------------------------------------------------------Params Numeric MA_Len(21); Numeric TrailingStopPercent(25); Numeric ReduceLots(1); Vars NumericSeries MA; Numeric BuyStopPrice; Numeric SellStopPrice; Numeric MaxSinceEntry; Numeric MinSinceEntry; Numeric PreLow; Numeric PreHigh; Begin MA = AverageFC(Close,MA_Len); If(BarStatus == 2) { PreLow = Low[1]; PreHigh = High[1]; } If(MarketPosition == 0 && Close > MA && Close[1] <= MA[1]) { Buy(0,Close); BuyStopPrice = Lowest(Low[1],4); MaxSinceEntry = High; } If(MarketPosition == 0 && Close < MA && Close[1] >= MA[1]) { SellShort(0,Close); SellStopPrice = Highest(High[1],4); MinSinceEntry = Low; } If(MarketPosition == 1) { MaxSinceEntry = Max(MaxSinceEntry,High); If(Low <= BuyStopPrice) { Sell(0,Min(Open,BuyStopPrice)); } If(Close < PreLow) { Sell(ReduceLots,Close); } If(Close < MA) { Sell(0,Close); } If((MaxSinceEntry - Close)/MaxSinceEntry*100 >= TrailingStopPercent) { Sell(0,Close); } } If(MarketPosition == -1) { MinSinceEntry = Min(MinSinceEntry,Low); If(High >= SellStopPrice) { BuyToCover(0,Max(Open,SellStopPrice)); } If(Close > PreHigh) { BuyToCover(ReduceLots,Close); } If(Close > MA) { BuyToCover(0,Close); } If((Close - MinSinceEntry)/MinSinceEntry*100 >= TrailingStopPercent) { BuyToCover(0,Close); } }End