Album positions come from one composite score, recalculated every hour from four weighted components. Only public albums that actually hold items are ranked, tied scores share a position, and the arrows show movement against yesterday's snapshot.

What the score is made of

• Depth (40%) — how completely you cover a collection, how much you hold in absolute terms, and how many variants you have.
• Rarity (30%) — the rarity of your items measured at the 75th percentile, so filler does not dilute a strong album.
• Portfolio value (15%) — estimated total floor value, scaled logarithmically so whales cannot run away with it.
• Engagement (15%) — likes from other collectors, also scaled logarithmically.