If only it was that simple
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"Inverting" a logic of a loosing EA is almost sure going to make it as bad as the original, if not even worse

If by "inverting a martingale" you think of what is often referred to as "anti martingale", anti martingale is not a what a name suggests and will, by no means, work for systems that are "random". Anti martingale can work on systems that tend to have streaks, and by looking at the code of the ea attached, that EA is not suitable at all to be "anti martingale"-ized

PS: some more info about anti martingale here : Gaming Concept, Anti-Martingale System but there is a lot of places where the concept is explained