MT4 build 1170 Strategy Tester : How can I backtest with Spread = ZERO ?

[ccou]

Hi,

I want to backtest my EA with Spread = 0 (I have my reasons).

If I set Spread to 0, the "Strategy Tester Report" shows "Spread = Current instrument Spread" (instead of 0) !

How can I force MT4 to use a ZERO spread?

Thanks