O’Neil spends a lot of time, in his first book, actually going over stock prices from way back and the history behind it and what his research revealed about it. Very good research and data. Worth a read for anyone that’s interested in making money investing. It’s not about being a trader. IMO. He shoots down “buy and hold”, “averaging down” as well as some other well ‘sold’ concepts about investing. he backs it up with very solid research and his track record is damned good as well. It will dispell much of what people have been lead to believe by MSM about “investing”.