The Wyckoff course from SMI consists of 5 units sold separately, including: Unit 1 - Technical Trading Techniques Workshop Unit 2 - The Richard Wyckoff Text on Stock Market Science and Technique Unit 3 - SMI Basic Lectures on Technical Market Analysis Unit 4 - Practical Trading Tapes and Practical Market Experience Unit 5 - SMI Advanced Testing Program For those familiar with the course, can you comment on whether all of the units are required to understand and trade using the Wyckoff Method? Do you think that only some of those units offer real value or are all of them worth owning? Thanks.