Well this is my 1st post to the forum, been lurking and reading for many months. I have a question perhaps someone could reply. I've been composing some EA's with the help of Meta Trader Builder. I've been backtesting some of these. The results are extremely confusing. I've 3 metatrader4 platforms on my computer all from interbank FX. I receive different results on each of the platforms. Some quite profitable with about 16,000 trades some with just 8,000 trades. The platforms which are 197 build are profitable however, the most current build is not. Can anybody explain why? Thanks for some help.