Schulenberg SPYPRED5 FUT
I've been trading this system for almost a year. It made solid returns during the up market of 2021. Then the market turned south at the beginning of 2022 and the system has adapted really well by utilizing SH to hedge the longs and occasionally going 100% short. It's not easy to find a system that does well in both up and down markets, but this one appears to do just that.