選股腳本- 周EMA 和 技術分析圖 顯示值不同

我寫了一個選股腳本用周EMA 篩選股票

篩選出來後發現某些檔和技術分析圖的值不一樣如 6596和6548,

但大部分股票值是一樣的, 如9927...

周EMA取 7 13 21 53, 本周沒過完, 所以看上一周weekema[1]...

麻煩了, 謝謝

附上程式

input: weeklength(7);   setinputname(1,"周均線期數");
input: dweeklength(13);     setinputname(2,"雙周均線期數");
input: monlength(21);   setinputname(3,"月均線期數");
input: quartlength(53);     setinputname(4,"季均線期數");

variable: weekema(0);
variable: dweekema(0);
variable: monema(0);
variable: quartema(0);
variable: maxaverage(0);
variable: minaverage(0);

SetTotalBar(1000);

weekema = xf_ema ("W", close,weeklength);
dweekema = xf_XAverage ("W", close,dweeklength);
monema = xf_ema ("W", close,monlength);
quartema = xf_XAverage ("W", close,quartlength);
maxaverage = maxlist(weekema,dweekema,monema,quartema);
minaverage = minlist(weekema,dweekema,monema,quartema);

if 
    closew(1) > maxaverage[1]  and loww(1)>minaverage[1] and  loww(1)< (maxaverage[1]-(maxaverage[1]-minaverage[1])*0.5)

then 

  begin
    value1= absvalue(weekema[1] -dweekema[1]);
    value2= absvalue(dweekema[1] -monema[1]);
    value3= absvalue(monema[1] -quartema[1]);
    value4= absvalue(quartema[1] -weekema[1]);
    if maxlist(value1,value2,value3,value4) < 0.05*closew(1) then  ret=1;
    outputfield(1, weekema[1], "weekema[1]");
    outputfield(2, dweekema[1], "dweekema[1]");
    outputfield(3, monema[1], "monema[1]");
    outputfield(4, quartema[1], "quartema[1]"); 
    outputfield(5, closew(1), "closew(1)"); 
  end;