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I don't think people would trade through a 3 year draining of your equity. You can weather a system drawdown if you have confidence that it will recover. Looking at that chart I would say there is something fundamentally wrong with the system. Was that Radge's WTT code modified or someone's own coding of the WTT? Either way, I would've thought that a filter (which Radge usually employs) would stop the bleed from the account. The code I have bought from Radge had a filter and was on the conservative side, mostly because the majority of clients can't handle a 20% drawdown. I think even Radge would have rethought the system reliablity with that kind of drawdown as he is about the numbers. When you start having multiple deviations way from what is expected and shown in backtests, there is a fundamental error somewhere. I like to develope my systems over rather benign period, try not to optimize anything if I can. Then run it against an event or bad years (2008, 2014, 2018, 2020). It's easy to get a system that worked great in, say 2009, its a lot harder to have an un-optimized system that runs goood most years and avoid ruin in big negative market events.