請問如何用XS寫出 "隨機相對指標" (STOCH RSI)

如題~~~公式如下 :

Stoch RSI = (RSI - Lowest Low RSI) / (Highest High RSI - Lowest Low RSI)

Stoch RSI = (RSI-N日內RSI最低值) / (N日內RSI最高價-N日內RSI最低價)

有大大可以幫忙的嗎

附上網路上找到的MU的寫法參考:

input: RSILength(13),
    StochLength(8),
    KLength(5),
    DLength(5),
    NormalPlot(1),
    ReversePlot(0); //(8,5,3,3) or (13,8,5,5) or (21,13,8,8)
Vars: DToscK(0), DToscD(0);
value1 = FastKCustomEasy(RSI(C, RSILength),StochLength);
DToscK =  average(value1,KLength);
DToscD = average(DToscK,DLength);
If NormalPlot=1 then begin
plot1(DToscK,"%K" );
plot2(DToscD,"%D" );
end;
If ReversePlot=1 then begin
plot3(absvalue(DToscK-100),"%ReverseK" );
plot4(absvalue(DToscD-100),"%ReverseD" );
end;