Working as a unit, each couple exchanges places with the other couple in the same line. Couples, as a unit, follow the right shoulder passing rule as defined for individual dancers. General rule: Any two directed dancers exchange places by walking forward in a semi-circle ending in the other dancer's starting position. Each trading dancer has reversed his original facing direction. If the trading dancers start while facing in the same direction, they pass right shoulders when they meet per the right shoulder passing rule.
Line or two-faced line.
Couples trade use normal couple handhold and styling similar to wheel and deal.