Harmonic Patterns are used by Forex traders to predict future movements of the markets from previous trading activity. Harmonic Patterns use the geometric price patterns which then use Fibonacci numbers to indicate particular turning and break-out points. List of Harmonic Patterns includes Gartley, Butterfly, Bat, Crab and Shark. An example for a 5 point pattern uses the first completed 3 legs, for instance a Bullish Gartley Pattern, when the XA, AB and BC legs are completed - the CD leg would identify a trade patterns.