Unfortunately, about 98% of all indicators in existence repaint the history. Live forward testing over at least 3 to 6 months gives you an idea as to the ea's possible reliability.

Most people peddling ea's want the money right away and sometimes get it by using backtesting results because buyers are not educated as to what to look for in an ea. Backtesting just gives you a very rough idea as to whether the ea may generate money, and that is only if the modeling quality is 90% or more.

I personally do not like a manual system because it also involves emotions when placing trades plus I have to stay up nights to play the best times (Located in U.S.) EA is still the way to go, but one must be committed to patience and somewhat scientific testing and modifications to reach a point of optimized settings in an EA.

Dave