跑出來的資料和指標數值不同

小幫手您好：

我寫了下列的程式，是用主力作多成本線的指標作修正的：csv檔案裏面，3661世芯的數字是719.93，但指標的數字是845.03

input:period(40,"期數");

if barfreq = "Tick" or barfreq = "Min"
    then raiseruntimeerror("不支援此頻率");

value1=GetField("主力買張");
value2=(o+h+l+c)/4;

value3=value1*value2;//做多金額

if summation(value1,period)<>0 then
    value4=summation(value3,period)/summation(value1,period);

//plot1(value4,"主力作多成本線");
value5=absValue((close-value4)/value4*100);
condition1=value5<3;
if condition1 then ret = 1;
outputfield(1,close,2,"收盤價");
outputfield(2,value4,2,"短天期主力價");
outputfield(3,value5,2,"和主力價差距");