回測跟實際誤差

您好：回測跟實際交易進場時間差很多...9點21跟9點24 ? 怎麼會?

//進場

input:length(3);

value1=average(close,length);

value2=average(volume,length);

value3=linearregslope(value1,length);

value4=linearregslope(value2,length);

condition1 = time<093000

and close>closed(1)*1.06

and close<closed(1)*1.08

and value3>0 and value4<0 ;

if Position = 0 and condition1 then begin setposition(-1);  

end;