For each lap, race concordance charts show the cars ahead – and the cars behind – a particular target car, giving you an at a glance view, on a lap by lap basis, of the traffic ahead and behind the target car, on track.
Race concordance chart

Weird but (sometimes) useful charts
For each lap, race concordance charts show the cars ahead – and the cars behind – a particular target car, giving you an at a glance view, on a lap by lap basis, of the traffic ahead and behind the target car, on track.