Oly lifting coach Diane Fu broke down the three requirements for receiving a snatch in the optimal position.
1. A squat width that allows for good depth. The deepest of squats.
2. This width should also accommodate an upright torso that carries a slight forward inclination.
3. Good knee to ankle alignment providing optimal stabilization mechanics.
You can read the post in its entirety and follow Diane on her Tumblr: fubarbell.