From Parallel Lines or a Generalized Thar.
Parallel Lines end in Parallel Lines. Trade The Diamond is a 4-part call.
Note: sometimes the Diamond Circulate brings dancers to the same spot (e.g., Trade The Diamond starting from Back-to-Back Lines). In this case, the dancers step to R-H and continue executing the call.
Criss Cross The Diamond [C4]: From Parallel Waves. Criss Cross The Deucey; Centers Hinge; Diamond Circulate; Centers Hinge. Ends in Parallel Waves.
See also Trade The Deucey [C3A].