The advice here is to treat stocks not as reflecting some underlying value, but purely as random quantities that vary over time, in other words as stochastic processes. Since I teach stochastic process modeling at the college level, I am in a good position to say that this advice is baloney. There is not a single statistical test in the book, and without a statistical test it's nothing but hunches. On average the people who follow the advice in this book will make money, because on average stocks go up. The problem is that there is a lot of variation around that average. Of 1000 people, maybe 510 make money, and brag about it. The other 490 lose money, and slink off quietly. A surer way to make money of this method is to write it up and sell it to unwary rubes. After all, there are 510 happy users out there bragging about how well it works!