On that Stocktwits stream OP says backtested with five years' worth of data and traded for two years after that. That's a full expansionary business cycle.
1) What happens during a recession/crash?
2) That backtest shows many small wins and a few very large losses. How often are you pricing for this strat to get knocked out? This is not trivial, it determines your cash vs strat allocation. If you can only run this strat safely at 75% cash cause you get knocked out every few years, current return isn't 40%, it's 10%
But what do I know, I'm not making 40% YTD
Source:
https://charts.stocktwits.com/production/original_107499511.png