Thank you very much. Ilus2dance. I can interpret the simplest alignments now.
To simplify the condition, I would like to use AB,BC. CD, DA to represent wall, LOD, center, against LOD.
1. How to describe the condition, when I dance down on AB ( wall)besides that facing LOD .moving toward the LOD , along LOD ?
2. When we said new LOD? If the previous LOD is BC, should the new one be CD after we have dance down LOD?
3. Is LOD relative for couple who stand close to different line before starting the dance ( the right side ( AB ) of A couple , their LOD will be BC; the right side (DC) of B couple , LOD is AB )?
How to interpret" toward allignment of 6" ( step 4 is pointing LOD, step 6 is facing DC ) ? Does it imply turning left continuouly btw LOD and DC?
Another qestion.
In Tango, what force drives the moving leg ? Is there a step push ?
( In swing dance , the moving leg obeys the rule of step swing, the massive mucles from moving hip propels its leg weight with swing .to allow the body weight journey. ..)