From twin diamond formation: All Diamond Circulate once and a half to form twin diamonds on a 45 degree bias. The two diamond centers plus the two inside points who step up shoulder to shoulder now do the Trade. These last two dancers, along with the lonesome points, now move forward to form ends of parallel two faced lines which are also angled 45 degrees.
Ron Wiseman 1975
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.