One of the Fibonacci trading tools is  Fibonacci Fans .. the concept behind this tool is that price trends to move in a diagonal manner not in a sharp up and down movements .. 

Fibonacci Fans is used as a method to determine Support and Resistance Levels which become more important when it intersect with another kind of support & resistance zones like previous Highs & Lows or big Round Numbers ... etc.

The following two short  videos will show you how to draw and trade  Fibonacci Fans on real chart examples ..