Steps are simpler in Foxtrot (in the sense that there are less number of steps), so focus on technique is important. The feet are always passing, so there is less rise and fall than in waltz. On the feather step, there is CBM on the first step, so the frame turns to the right. On the three step, CBM happens gradually across the three steps, so the frame is wound to the left by the end of the figure. The motion is likened to swinging like a monkey from vine to vine.
The feet stay in contact with the ground all the time. When stepping back, the leg needs to swing back like a pendulum. The tip of the toe touches first, and then one rolls back onto the foot. The heel does not touch the ground until the feet are even.
Posture, position, and frame: Position refers to the relative position of the man and woman. Because the man is normally taller and heavier, the lady needs to shape left and back much more than the man. In addition to shaping left, while keeping contact through the body, the lady also bends back at the 6th or 7th thoracic vertebra.