I have turned MT4 off line and delete all period
history files from its history directory and then
imported the 1M data from
http://www.alpari-idc.com/en/dc/databank.php. I then
use the period convert script to generate the 5min,
15min, 30min, 1hr, 4hrs and daily periods and then import them into the history center.

These period files are what I assumed to be correct. I
then export them onto multiple other computers with internet off to test
the same EA. I find that I would still get different
results with a same EA on different computer. What am
I doing wrong as my EA is trading off the 1hour open?

Does anyone have a correct procedure for 1M backtesting? BTW, i have read about FXTheader, how would I implement it to help me out with the offline backtesting?

Trong