Stand with your feet roughly pelvis width apart

Shift your hips back so they sit directly above your knees and ankles in a vertical line.

A plumb line can come in handy here to give you a visual when trying to get your legs vertical.

Place one end of the plumb line on the bony prominence at the outside of your hip (called your greater trochanter) and let the weighted end fall toward the ground.

Notice where the weight is positioned relative to your outer ankle bone. Your leg is vertical if the weight is directly in line with your outer ankle bone.