OK...Elliot as well as Gann...
Yes, I already am familiar with Elliot and his 'waves' and the retracement levels are a critical part of trading of course, those are important when looking for a price objective off of a divergence for instance....
I like to look for a 38% retracement off of a strong divergence....then just take the profits and run...look for the next setup without getting married to it...
Very high percentage trading...
Cheers!