A few of beginning and more experienced traders get caught into the fallacy they can predict market most of the time. The truth is lots of very successful traders can predict the market only occasionally, in special circumstances, when they have an edge. Take time to skim fast through the book if you haven't. It's all about a trader taking a trade only when the odds are skewed into his (or her) favor. This reads that you need a statistical edge to be successful as a trader. Psychology is a great deal but only for people who mostly lack in discipline and not method.