someone asked me about this, so I dug it up, the old BPT paint dry system. I've always loved the name.  I asked AI to create an image to represent that.

Otherwise this system over the long term did well catching the major trends in the market, while keeping you out of a lot of those 70's bear market, the 87 crash, the 2000 - 2002 tech bubble crash, and 2008. 

that said, it's too paint dry for me - notice it holds through the March 2020 covid crash, which over the long term is fine, price came right back, but for me, I don't like going through 30% draw down. But over the long term, the paint dry system work, maybe only applicable to folks who never do trades - it will keep you out of major bear markets, but not flash quick crashes like the 2020 one. 

This also shows you how the market has changed - Steve and I commented before about this; these days with the old Fed QE and now ODT options, and all the algos, the market doesn't move as smoothly as it did in the past. In the past you would tend to get these long rolling movements, and when you got a correction, it took time to recover - while these days you can 30% corrections and recover in a few months - in the past that would take a couple years many times.