I'm surprised that you never read about him!....Tom DeMark wrote 3 books and one with his son...he worked for the "Big Guns" like Michael Steinhardt and Goldman Sachs....
He donated a spot at Wharton Business School which was really the spot to go for executives at Morgan Stanley: I did spend a semester there years ago....Prof Siegel was funny and extremely well received by our group; my wife came with me for the fun of it!!