How Selling-fast ranking works
Ranks by urgency — inventory divided by sales rate = days of stock left, lowest first.
Selling fast ranks by scarcity: how many days of stock are left at the current sales rate. It divides on-hand inventory by the average daily sales rate — the lowest result (closest to selling out) ranks first. Great for creating urgency and clearing hot stock.
1. The collection, unranked
A normal collection page. The order is whatever the catalog lists — the best performers could be buried on the second row where few shoppers scroll.
2. The ranking engine scores it
For each product the engine computes inventory ÷ (units sold ÷ window days) — the days of stock remaining. Unlike every other signal, lower ranks higher here: the product nearest to selling out leads the collection, so shoppers see it while it lasts.
3. The front row gets discovered
The strongest products now fill the front row — the slots that get the most views and clicks. That’s the payoff: ranking turns your best products into the ones shoppers see first.