different data between ea and indicator

Hi,

I running simple code on ea and indicator using tester. Timeframe is H1. The code is:

   double h = iHigh(NULL,PERIOD_D1,0);
   int err = GetLastError();
   if (err!=0)
       Alert("error __high=",err);
   GlobalVariableSet("__High",h);
   double l = iLow(NULL,PERIOD_D1,0);
   err = GetLastError();
   if (err!=0)
       Alert("error __low=",err);
   GlobalVariableSet("__Low",l);
   return(0);

This is the only code and the only differences between ea and indicator are names of global variables  i.e __Low and _Low.

The problem is reported values are different i.e. low from ea is different than low from indicator ect. No error is reported.

regards,

toso