The following chart of harmonic pattern success results is produced by FxGroundworks, and is a systematic analysis of nearly 3000 patterns.
Source: FxGroundworks.com - click for more details
The percentage of harmonic pattern success results for each of the harmonic patterns (Gartley, Butterfly, Crab, Bat) is over 80% for all patterns and in some cases over 90%.
Something like over 400 patterns a day are identified, typically. That's a lot of successful patterns with a predictable outcome, giving you a fantastic edge over other traders.
Click on this link for more information about FxGroundworks.
Although the harmonic pattern succes rates show they are 80-95% successful, it doesn't necessarily mean your trades will have the same success rate.
My trading win rate seems to vary between 60% and 75% - which is enough to be profitable of course.
Your trading success is, as always, completely dependent on how you trade it - where you enter, where you put your stops, how you react to price action during the trade, and where you exit.
But that's exactly where the harmonic methods and trading tips described in this website will help you to be successful.
Other pages in this series on Harmonics Basics are:
Learn how Adaptive Position Sizing can grow your account balance - exponentially.
Real-time harmonic alerts to pc and email. Free harmonics education videos and harmonic software. Harmonic traders chat room.
Certified Harmonic Trading Educational Webinar Series
Over 15 hours of educational lessons narrated and presented by the originator of Harmonic Trading, Scott Carney.
I use ForexSmartTools to run my forex trading business. Watch the video - see how they work
Further Reading
Good Books for Harmonic Traders