Double my account in one week.

Forex trading best way to make money online and your account double in a demo account it is not a big deal because demo account not a real account that is its reason to account double because Demo not making losses
 
As a professional forex trader i didn't agree with you because when you are forex trader & you think your invest money double in a week that is greed thinking. I know in this way many people lose there money with forex trading business. I think you earn money with planing then you can long time stay in forex market with successfully.
 
You may was well head over to live account (small) and see what comes up; the demo can be used to develop trading strategy, fair enough. But just remember that the demo can vary from a real account..