这是一个自适应均线的策略，求教其中的买开价，买平价，卖开价，买平价应该写什么？才不会偷价，更符合实盘，就是公式里打问号那里，谢谢你们。

Params

Numeric EffRatioLength(10); //自适应周期

Numeric FastAvgLength(2);   //短周期

Numeric SlowAvgLength(30);  //长周期

Numeric Length(20,5,40,1);

Numeric Percent(0.1);

Vars

Series<Numeric> AMA;

      Numeric Filter;    

Events

  OnBar(ArrayRef<Integer> indexs)

   {  

  AMA = AdaptiveMovAvg((High + Low + Close)/3,EffRatioLength,FastAvgLength,SlowAvgLength);

  PlotNumeric(\"AdpMa\",AMA);

  Filter = Percent*StandardDev(AMA - AMA[1],Length,2);

     If( MarketPosition <> 1 And (((AMA[1] - AMA[2]) > Filter) Or ((AMA[1] - AMA[3]) > Filter) Or ((AMA[1] - AMA[4]) > Filter)))

       {

           Buy(1, ？);

       }

      If(MarketPosition == 1 And BarsSinceEntry >= 1 And (((AMA[2] - AMA[1]) > Filter) Or ((AMA[3] - AMA[1]) > Filter) Or ((AMA[4] - AMA[1]) > Filter)))

       {

          Sell(1,  ？ );

       }

      If( MarketPosition <> -1 And (((AMA[2] - AMA[1]) > Filter) Or ((AMA[3] - AMA[1]) > Filter) Or ((AMA[4] - AMA[1]) > Filter)))

       {

           SellShort(1,  ？ );

       }

      If(MarketPosition == -1 And BarsSinceEntry >= 1 And (((AMA[1] - AMA[2]) > Filter) Or ((AMA[1] - AMA[3]) > Filter) Or ((AMA[1] - AMA[4]) > Filter)))

       {

          BuyToCover(1,  ？ );

       }

   }