Forex is risky and every broker has a risk warining, do not invest money you cannot afford to lose.
Personally haven't and will never use a martingale or grid robot in live because they multiply lots and wait the reverse trend for go in profit, and in a big trend the risk in money is high. I have lose some money but I have never blow up my account.
Now I'm using this system in live:
You must be registered for see links
The results are in balance (no good, no bed)
There are a lot of systems in this site.
I'm also testing new systems and Expert Advisors in my live account, but never martingale or grid.