Not an expert on backtesting but would still recommend to run the EA on demo to get the desire results.
Just thinking if most of the EA work in similar fashion? When the price went up, the EA will just sell and will be more aggressive to sell when the price went further up. And it will just take the profit when price turn down. If the price didn't go down, the account will just blow out.
I am wondering if there is any EA that actually trade with the trend? And take profit with trailing stop?