請問一個好用指標AM A的寫法..麻煩各位高手..謝謝...

 請問在MC裡有內建AMA..但我要怎樣寫成XS的指標

Inputs: Period(20),fastestend(2),lowestend(30); 
Vars:ER(0),SC(1),fastest(0),slowest(0),AMA(0),diff(0),direction(0),volatilitys(0);

IF CurrentBar <= Period Then AMA = Close;

IF CurrentBar > Period Then Begin
       Diff = AbsValue(Close - Close[1]);
       direction = AbsValue(Close - Close[Period]);
       volatilitys = Summation(Diff, Period);             
       if volatilitys <> 0 then ER = direction / volatilitys;
       
       fastest=2/(fastestend+1);
       slowest=2/(lowestend+1);             
       SC = Power(ER * (Fastest - Slowest) + Slowest, 2);
       AMA = AMA[1] + SC * (Close - AMA[1]);
End;

plot1(AMA);