What R.N. Elliott set out to describe using the Elliott Wave Principle was how the market actually behaves. There are a number of specific variations on the underlying theme, which Elliott meticulously described and illustrated. He also noted the important fact that each pattern has identifiable requirements as well as tendencies. From these observations, he was able to formulate numerous rules and guidelines for proper wave identification. A thorough knowledge of such details is necessary to understand what the markets can do, and at least as important, what it does not do.