From parallel two-faced lines or waves: The centers 1/2 Circulate as the ends flip exactly as in Flip the Diamond; this gives the center 6 in a column. All finish exactly like a Coordinate: Center 6 Trade, then outside 2 and very center 2 move up to become the ends of the ending formation.
George Amos 1984
This definition is from News and Notes by Al Brundage, Earl Johnston and Ed Foote.
It is provided here for informational and educational purposes only.