I just can say that it does not work consistently. I am not talking about passing one time the challenges. I am talking about doing profits for at least 4 to 6 months. Then it comes whether the underlying strategy has an edge or not. I also tested the mean reversion bollinger band strategy on many pairs across different time frames from 5min to 4 hour bars, and the out-of-sample curve overall is just flat, so you basically cannot do profits in that way too when you speak of consistent profits. It ist just not that easy to find something consistent profitable. It would be like (re-)inventing a money printer machine where you could be (multi-)millionaire trading Spot FX.
Who says here, it is that easy and you can EASILY pass any challenge evaluation ?
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