Is anyone here using Fibonacci Extentions for profit taking goals in FX?

If yes, can you describe how you're using and which amounts do you consider important.

I religeously utilize Fib retracements to aid with my trading. Key retracement levels, 38.2 50.0 and 61.8 seem default, however when it comes to Fib Extentions, after much study, it would appear that there are lots of diverse interpretations.

Most frequent extention levels used seem to be 1.382 (weaker trend) and 1.618 (stronger trend).

Anyhow, interesting to this any notions.