Matt and Scott revisit a concept explored thoroughly in the Blue Book (Starting Strength: Basic Barbell Training 3rd Edition) but, until now, not given the full treatment at Barbell Logic. This concept is known as the Master Cue, and refers to the importance of keeping the barbell positioned over the middle of the foot, or simply "midfoot", during the squat and deadlift. The Master Cue is a reminder to the lifter to make the bar travel perfectly vertical, as if moving in a vertical slot.