Harmonic ABCD Pattern
The ABCD is a basic harmonic pattern. All other patterns derive from it. The pattern consists of 3 price swings. The lines AB and CD are called “legs”, while the line BC is referred to as a correction or a retracement. AB and CD tend to have approximately the same in size.
Bullish ABCD pattern follows a downtrend and means that a reversal to the upside is likely.Bearish ABCD pattern is formed after an uptrend and signals a potential bearish reversal.
For both the bullish and bearish versions of the ABCD chart pattern, the lines AB and CD are known as the legs while BC is called the correction or retracement.