Your stance is quite wide, you might benefit from bringing you feet in a bit. The best way I've found to find a good squat stance just sit down in a full squat position, without weight, and play around with your foot position until you find what is most comfortable. It'll probably be narrower than you're squatting now.
To 'generate torque' stand with your feet planted and try to twist your feet out using just your glutes. Do that all the way through your squat.