Back Turned (BT)

Back Turned is a generic stance, which all characters can be subjected to through various means, and some characters can manually enter.

Generic moves in Back Turned

BT 1_2 - 8f high, -8 / +3 / +3 15dmg
BT 3_4 - 10f high, -8 / KND W! / KND W! 18dmg
BT d+1_2 - 10f special mid -2 / +9 / +9 10dmg
BT d+3_4 - 10f low, -11 / +3 / +3 12dmg
BT u/f+3_4 - 15f mid, -11? / Launch / Launch

Characters that can manually enter Back Turned

Feng (b+3~4)
Hwoarang (1+2, has both generic BT and Right Foot Forward BT (RFF BT))
Kunimitsu (b+3+4)
Lei (b+3+4)
Lili (b+3+4)
Lucky Chloe (3+4)
Master Raven (b+3+4)
Xiaoyu (b+3+4, called Rain Dance Stance (RDS))
Yoshimitsu (b+3+4, called Meditation (MED))

Recovering into standing from Back Turned

6 frames to turn and block with f,B (raven BTb3+4,B, Ling ub~B)
6 frames to turn and block by holding forward - this lasts for 18 frames(?) until you have to again hold back to continue blocking.
7 frames to turn and block with holding back
9 frames to turn and block with db,B - this enters crouch state on frameX? and then high crushes.

Examples of setups to get enemy Back Turned

Generally all characters have a way of using the wall to setup a "tech trap" in which you can make it hard or impossible for the enemy to block your next move.

Wall ender with some quick recovering move into U/F, jump over enemy into BT d+1_2 in their back, generally guaranteeing a 14- frame or faster move starting from the Full Crouch state into their back unless they already turned to face you before the BT d+1 hit them (usually by attacking or doing a throw).
Wall ender with some quick recovering move into U/F+3_4 which depending on your timing can hit their front or back, thus making it very hard or impossible to guard in the correct direction.