I've noticed

[pepdegree]

As soon as the market recovers,make a quick rally and then retrace a bit,Fibonacci threads start popping up.

 

[Wide Tailz]

I've noticed that most people only remember the few times when predictive methods work out, not when they fail.

Fib levels are fun to play with, but guessing is guessing.

 

[Spear Point]

I would not actually use them in a predictive manor. More of levels to ask "If this, then do that", or "if that, then do this."