Quote from bone:
"Cyclical methods in technical analysis, for instance the Elliott Wave Theory, function especially well on paper. The theory is not quite so successful when the forecasts are compared with actual trades. It is, of course, possible that the downwards correction in a market equals exactly 61.8 per cent (a so-called Fibonacci retracement) of the preceding upwards movement, in which case the theory has been proven right once again. The fact that the market has previously breached other main correction levels is not mentioned. As long as the analyst does not need to trade, he can afford the luxury of cherry picking hits only. Insinuating that someone who does not earn any money using the Elliot Wave Theory or Gann cycli has not understood these theories correctly is going too far, however."
Goldberg and von Nitzsch (1999)