While the book is excellent and well written, random walk theory has been proven incorrect time and again. Academia now is shifting away from random walk. Professor Andrew Lo of MIT, for example, has done substantial work showing that technical analysis may be profitable. If the markets were random, this would not be possible. That said, this book was written before such work was available, and offers excellent insights. However, if you are looking for help in your trading and investing, try the technical analysis section.