To the contrary, your back is too vertical. I think this is an artifact of squatting inside the rack -- the uprights are encouraging you to not hit them, and you keep your chest up too much. So your cue is wrong. Watch our videos about this.
To a certain extent I've cleaned up my grip, bar placement, and "bounce." Still really struggling with an over-exagerrated forward lean on most reps, which leads to reps being stickier than I think they need to be. The cue I'm telling myself is "chest up." Any help appreciated.
Squat 275.0 - YouTube
To the contrary, your back is too vertical. I think this is an artifact of squatting inside the rack -- the uprights are encouraging you to not hit them, and you keep your chest up too much. So your cue is wrong. Watch our videos about this.
What Rip said, plus what you are over exaggerating is the neck position. You are keeping you neck too far back instead or putting it in a neutral position, which I am fairly sure leads to the too vertical back.
Keep in mind that until you squat 500 x 5, you will never ever lean forward too much.