Swing Analytics (Sportsbox-style positional metric).
What it measures
SportsBox Chest Sway @ IMP—face-on lateral displacement versus Address at Impact. Interpret signs strictly from SportsBox (+ toward target is common)—not thrust depth traces.
Units: inches
Why it matters
Anchors torso translation myths at strike—pair Pelvis Sway @ IMP plus Sway gap when both export.
When the number looks wrong or noisy
Walking the lens target-ward blows lateral inches—coach check vs practice video alignment.