You n Me both, brother!
It's really easy to look at a backtest and dream about the future, but the actual reality is that if backtests worked, we'd all be EA millionaires.
The "Strategy Tester" isn't to gauge future performance by past, it is useful in verification of trading logic.
If the EA does what you tell it to do, you are still at a great risk, but this should at least give you an understanding.
Money Can't Buy Happiness. Poverty Can't Buy SHIT! You Choose!