Hi,
I don't really think you can get a demo, have to buy it. I bought my copy because as a college student I was struggling to find some ways to make some spare cash, knowing I didn't have much to invest initially.
After reading a lot of reviews of things I didn't really believe, I stumbled upon some of the robots I thought looked more promising. I realized I would be at a huge disadvantage playing the market just by instinct rather than real calculations that others were using. The one I found that looked the most reliable was
http://www.forexmegadroidsoftware.com
Reasons I chose it:
Developers had over 35 years of trading experience
Ability to adapt to any market condition
-This seemed to be the real unique feature
Claims of over 300% gains a month
After reviewing as many systems as I could find, I purchased this one. I only had a $1000 to invest, but tried it anyway. I honestly didn't make a 300% gain, but I did increase my $1000 to ~$2300 in just under a month. I'd say that's pretty good. Maybe larger investments could have greater gains, I don't really know. I did have a few days with losses, but none were more than $55.
Just my honest review here, hope it helps you in your decisions.