Bill has always been very generous in sharing his knowledge with others. He is also a loyal follower of Mr. Michael Harris. Anyone who is interested in high probability patterns and mean reversion of their win rate should read the latest Harris' blog I got in my feed reader about SP500 patterns he disclosed in his book, which was published in 1999. http://www.priceactionlab.com/Blog/2011/03/performance-of-three-sp-500-patterns-from-my-1999-book/ I just hope other authors who have also presented all sorts of trading methods in their books will come forward and be as honest and straightforward as Mr. Harris in providing an assessment of the performance of their methods in their books so that people know whether they paid for crap or for something of at least some little value.