I once considered taking an $899 course on currency trading from FXCM.com, so there must be at least some people who think they can teach it and others willing to pay to learn.

Also, with other i-banking specialties you need a larger supply train, including data gathering, analysis, packaging (as a fund) and marketing. With technical trading all you need is your computer and you. Why would a young person who is skilled at technical trading work inside an investment bank? How can you be sure that there aren't thousands of skilled traders making a killing from home? Isn't this sort of like hackers?