DislikedI don't know if you've ever hung around www.myfxbook.com. I've been a frequent visitor there for about 18 months or so (although not so much now) because I am tired, yes tired, of seeing account, after account, after account, after account getting smashed to smithereens.
A system, any system requires you to know what to do at various times... because an EA based system can and does require maintenance and constant adjusting. If you don't know how the system operates and just blindly let it do what it wants it will likely get you slaughtered at some point.
You are better off making your own system and knowing it intricately forwards, backwards and so on. Running a system on demo is easy because there's little to no emotion other than the hope that it does well and succeeds at what it does for longer than a few months.
I posted a snapshot of this a few times in another thread. It's meant to show you that Profitable FX trading is possible, but you have to find your way you have to develop your plan.
This is no different than wanting to make $25 an hour at work if you are only making $10 an hour. To make that $25 an hour there are things that come with that that may require you to have a certain education, so many years experience etc. For some reason people want to believe forex is different and some how easier.
While the picture shown below is a demo acct. my live account performs equally as good and sometimes better.