Daily rank · cohort of 12
The Bump
A cohort of 12 prospects, ranked against each other by daily BC 1st auto avg. Lines that cross are the days when prospects passed each other in price. Use the pills to swap the cohort — cheapest, most undervalued, biggest movers.
What the chart is. We grab today’s top 12 most expensive prospect autos (base Bowman Chrome 1st auto avg) and treat them as a fixed cohort. For each of the last 14 days we look up what each of those 12 was worth that day and rank them 1 through 12 against each other. Connect the daily ranks and you get a bump chart — a clean comparison of how the priciest 12 have shuffled position over time.
The y-axis is rank, not price. A line at #1 doesn’t tell you the dollar amount — only that the prospect was the priciest of the 12 on that day. Hover any point for the actual price.
Crossings are the moves. When two lines cross, that’s the day those two prospects passed each other in price. A line that climbs from #8 to #2 over the window is a card that ran. One that drifts from #3 to #9 is a card that’s cooling against its peers, even if the absolute price barely moved.
Why 14 days? Long enough to show structural shifts, short enough that a single hot week is visible. The 30-day per-prospect view is
the Arc; this view is comparative.
