SUPERTREND 程式

請教高手, 找不到程式碼錯在哪?  正確的跟有問題的截圖如附件

Input: Length(12,"天數");

Input: Multiplier(3,"ATR倍數");

var:v1(99999),v2(0);

var:UpDn(true); //true = Up; false = Dn

//

if currentBar = 1 then begin

updn = true;

end;

if currentBar <> 1 then begin

if updn = true then

begin

if close > v1 then begin

updn = false;

v1 = 99999;

plot4(close-atr(length)*Multiplier);

end;

end

else

begin

if close < v2 then 

begin

updn = true;

v2 = 0;

plot3(close+atr(length)*Multiplier);

end;

end;

end;

//

if updn = true then begin

value1 = close + atr(length)*Multiplier;

if v1 > value1 then v1 = value1;

plot1(v1);

end;

if updn = false then begin

value2 = close - atr(length)*Multiplier;

if v2 < value2 then v2 = value2;

plot2(v2);

end;