How Pre-Order Algorithms Work
On Amazon, pre-order sales do not count toward your launch-day sales rank. They are allocated to your sales rank on the day of purchase, which means pre-orders purchased over a three-month window trickle into the ranking calculation across that entire period. The launch-day spike that drives discoverability comes from purchases made on publication day. On Apple Books and Kobo, pre-order sales do count on release day, making pre-orders significantly more valuable on those platforms. Know your primary retailer before deciding whether pre-orders serve your launch strategy.