nobody is really using MT5, it has a lot of drawbacks. So, stick to MT4. I would highly recommend the forex hacked ea. I've tried a few different EA's over the years, and this is really the only one that has continued to work consistently for me. And I will stress again that the key to consistency and success with this EA is maintaining a very low risk ratio. With the normal default settings, I would recommend a balance of $2000 for a starting trade size of .01 . If you run the scalper settings that you want bump that up to $5000 for a starting trade of .01, because it is real easy for the trade size to get very big while you are waiting for the trend to reverse. If you have the equity to support it, you will win, and you will continue winning. If you trade this with too high of a risk ratio, you may win at first and even see some impressive profits, but I can guarantee that eventually you will overextend your account and get wiped out. So just keep that in mind. It will only work if you are very strict and conservative about your risk management. (which really is good advice for any EA)
Good Luck!