Rules:
Flats are always a 3 wave structure.
Wave A is a three wave pattern and never a Triangle.
Wave B is subdivided into a three wave pattern.
Wave B retraces to at least 90% of Wave A.
Wave C always subdivide into 5 wave structures: a Diagonal or an Impulse wave.
Guidelines:
Waves A and C connected usually is parallel to the Line connecting the origin of the ZigZag to point B.
Waves A and C usually are Equal in length.
Wave C is always ended around the end of Wave A.