Double three is a sideways combination of two corrective patterns including zigzag, flat, and triangle. When two of these corrective patterns are combined together, we get a double three
Guidelines
• A combination of two corrective structures labelled as WXY • Wave W and wave Y subdivision can be zigzag, flat, double three of smaller degree, or triple three of smaller degree • Wave X can be any corrective structure • WXY is a 7 swing structure