What Is Sell-Through Rate?

In plain terms: of the units you had available to sell during a window, how many did you sell? A product that sold 50 of the 60 units it had is moving fast. A product that sold 50 of 1,000 units is not, even though both show the same raw sales number. STR normalizes demand by stock depth, which is exactly what raw sales counts hide. We go deeper in our post on the sell-through rate attribute.

Why Does STR Beat Raw Sales for Some Goals?

Best-selling style sorts reward whatever you stocked deepest, because deep stock generates big absolute numbers. STR cuts through that. It finds the fast movers you bought conservatively, the small-batch products outperforming their inventory, and the items that deserve a reorder and a better position. It is also an inventory health lens: consistently low STR in premium positions means visibility is being spent on products that do not move. If your goal is selling through what you own, rather than just maximizing clicks on already-deep stock, STR is the better compass.

How Do You Sort by STR in Practice?

Use a sorting app that computes STR per product over a window you choose and applies it as a weighted signal through the API. Pure STR sorting can get twitchy on low-stock items (selling 3 of 4 units looks heroic), so blend it with sales velocity and an inventory signal to keep the order stable and buyable.

This is one recipe signal in Dynasort. Install it from the Shopify App Store or see how it works.