The recent introduction by Alpari UK of "interbank spreads" on their MetaTrader 4 demo accounts has given us the perfect opportunity to demonstrate one of the potential problems you might encounter using the MetaTrader 4 strategy tester to evaluate a forex trading strategy you have developed for yourself, or even bought off a virtual shelf. Our regular readers will know that we have performed numerous live tests and backtests on the Forex MegaDroid "robot". Today is a Saturday, so I had a few minutes spare to run yet another backtest on the Droid. I started the simulation on March 30th 2009, the date the Forex MegaDroid team launched their creation amid great fanfare, and finished it yesterday evening. Here's what the Alpari UK MetaTrader 4 demo strategy tester showed me:
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