I have been trading using the fibonacci retracement in a setup I was told is called an "ambush". Basically it is when price retraces to the 50% line and bounces off. If it breaks the 61.8% it is considered to be a failed setup. The target is simply a -23.6% retracement. Has anyone else used this system? If you have, how did you do and do you have any comments?
Here is an old school example:

Here is an old school example:
