Can I suggest you take a look at Money-Grid? (for some reason I'm not allowed to include a link to it - can't think why, it's not a secret…). They say
>uses a unique grid trading method. This unique grid method in combination with a martingale lot multiplier makes this
Expert Advisor 
a winning auto trade system. The major advantage of this
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is the limited amount of risk involve.< [sic]
So a dangerous Martingale with a dead-man's-handle? Maybe…