In a Triangle, the waves always subdivide into 5 waves: A, B, C, D, & E.
Wave A never goes beyond the origin or point X.
Structure = 3-3-3-3-3
At least four of the five waves subdivide into a zigzag or a combination of zigzags.
Triangles do not have more than one complex subwave (only one Double or Triple).
One of the five waves can subdivide into an Impulse