On this page
Understanding In-Stock Sales Velocity
How Flashpricer calculates sales velocity using only in-stock days — units sold ÷ days in stock across 15/30/90-day windows — plus how to read the hover breakdown, spot demand trends, and use days-of-stock-left to build a reorder list.
Raw 30-day sales totals hide your real demand — if you were out of stock for half the month, they badly understate how fast an item actually sells. Flashpricer's sales velocity counts only the days you were in stock, so you can see true demand, spot trends, and know how many days of inventory you have left.
Why plain 30-day sales lie to you
Say a SKU sold 157 units in the last 15 days — but it was only in stock for 14 of them. A calendar-based average would spread those sales across days you couldn't sell at all, making demand look weaker than it is. And the longer the item sits out of stock, the more misleading the number gets.
The fix: velocity in Flashpricer is units sold ÷ days in stock for each window — your average daily sales for the days you could actually sell.
Reading velocity on the Products page
Every SKU shows its 15d / 30d / 90d velocity with trend arrows. Hover over the velocity figures to see the full breakdown — units sold, in-stock days, and the resulting units/day for each window:
Reading from the 90-day window up to the 15-day window tells you where demand is headed. In the example above, velocity climbed from 3.4/day over 90 days to 11.2/day over the last 15 — this item is accelerating, which a flat sales total would never show you.
- ·Short windows (7d / 15d) — what's happening right now; most sensitive to recent price changes and Buy Box wins.
- ·30d — your working average for restock math.
- ·90d — the long-term baseline; compare against shorter windows to spot acceleration or decay.
Days of stock left
Flashpricer divides your current sellable quantity by your in-stock velocity to estimate days of stock remaining — shown right in the row (like 4 DAYS · LOW above: 40 units on hand at ~10.5 units/day). No spreadsheet required.
Build a reorder list in seconds: filter your catalog for items with less than 30 days of stock left (or tighten to 15 days for the urgent list), and buy against real demand instead of stale totals.
FAQ
Why do the 30d and 90d windows show the same units sold?
Does out-of-stock time hurt my velocity number?
Where can I see this per-SKU with more detail?
See your velocity and days of stock left on the Products page. Questions? Email success@flashpricer.com.