I should be a bit more clear regarding my "sucks" comment. I did not do any comprehensive study with many different markets. I tried a few and even did some optimization and even added the spread filter described in the article. Been building systems for several years and because of that experience I saw pretty quickly that it just wasn't worth my time to go very far. Just another way of looking at the same data that stock indicators look at. Doesn't really add anything to the bag of tricks that I can see.