If you invest, wish you had a mentor on the trading floor, but don't know anyone who works on the exchange, you should read this book. Mamis discusses not only market indicators so you can better time buys and sells, but explains what happens on the trading floor and how the professionals -- the "they" many investors refer to grudgingly -- benefit from herd psychology. After reading this you will better understand why the "average investor" is more likely to lose than win, and why many people, in fact, subconsciously prefer to lose. Mamis has an easy style which reflects his many years of investing experience -- it is not a dry, academic discusson of the market.Along with "Reminiscences of a Stock Operator" and a couple of others, this is one of the best and most informative books I've read about the market.