Accurate Backtester?

Hi

Does anyone know of an accurate backtester for MT4 EA's. I am pretty sure that I don't need to go into detail about the unreliability of the backtester that is supplied with the broker software. Missing chunks of data, refusal to cover certain dates, data just plain wrong etc etc.

Help will be repaid in beer (or kool aid for the non-drinkers)

Thanks

David

Are you familiar with interpolation?

Tick modeling is different between brokers. If I were to get an Ibfx demo, a fxpro demo, an odl demo, and fxdd, and used the same data from alpari, I would get different results. The best you can do with regard to backtesting is to have tick data. That's hard to come by.