What is the correct or best alignment for Chair & Slip in Foxtrot? Thanks

delightfuldance. Best alignment for the Chair and Slip Pivot in Foxtrot.
It depends on where your entry is coming from and what is to follow.
A suggestion is Open Telemark with a normal entry into the Chair diag to wall. Slip to face diag to centre. You now have the choice for any Reverse Movement.
I like this one in the Waltz. From a Chasse staying in Promenade. The Chair then Slip to face diag to centre and finish with a Chasse to the Right with 456 of a Reverse Weave ending.
If you need the practice you could from there do the whole group again and again. Good Luck