Squat Parallel

Going to parallel is the general recommendation, and your results will be fine just going to parallel. Parallel is defined as where the tops of your thighs are parallel to the floor. If the knee is not tracking over the toes during the movement this results in twisting/shearing of the joint and unwanted torque affecting the ligaments which can soon result in injury. The knee should always follow the toe. Have your toes slightly pointed out in order to track the knee properly.