Swaying is when our Back Knee/ Hip move Lateral. So What can we do to remedy this??? Here are 3 options that may help our readership:
1st place a 6 irons against your back leg if done Correctly the club will turn behind you and fall toward the Ground. If not it could ride up your pant leg or shorts.
Next, cut a Tennis ball in Half place it under back foot IF You Turn then you should Feel the ball going into the ground.
Lastly, stand against the a WALL with your back side just touching as you turn back your Back Cheek should Touch the wall.