From Parallel Waves, Two-Faced Lines, or other applicable formations.

Leaders Trade as Trailers diagonal Pass Thru.

Parallel Waves end in opposite-handed Parallel Waves;

From L-H Waves:       before Trade Circulate   half-way   after

From R-H Two-Faced Lines:       before Trade Circulate   half-way   after

Notes:

• Only the original Leaders can Roll.
• Pass Right-shoulders with any dancers you meet. This is especially important if the call is 1/2 Trade Circulate.
• From Parallel Waves:
  • Trade Circulate is identical to Crossover Circulate.
  • The Leaders' part is identical to Trade The Wave.
  • Point at the dancer to whose spot you are going, or make eye-contact with that dancer. That dancer should also point or look at you. Such teamwork increases the success rate of this call.
• From Parallel Two-Faced Lines:
  • Trailers should point at each other since dancers often try to do a Crossover Circulate instead.
  • Dancers often say "Ding-Ding" as the Trailers move past each other ("Ding-Ding" is the sound made by two streetcars ringing their bells as they pass).

Trade Circulate can also be done from other formations:

From Asymmetric Inverted Lines:     before Trade Circulate   after	From Two-Faced Lines of 3:     before Trade Circulate   after
From T-Bone Couples:       before Trade Circulate   half-way   after