I think it is "The Elliott Wave Principle" by Robert Prechter, who has made a lot more money selling books than profiting from its use. However, I would not waste my money if I were you. You could do as well with "Madame Endora's Fortune Cards", since both are about equally founded in scientific or mathematical reality.
Kind regards, -CAPT J
"What would you attempt to do if you knew you could not fail?"
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