Hey! I tested a 3 rule strategy on SPY, the fund that tracks the S&P 500, across 26 years from January 2000 to August 2026. It made profit on 73.71% of its trades. Its worst losing drawdown was 15.52% but holding SPY across the same years would have put you 49.91% down at the worst point. Here is what it did, and where the difference came from.