Yesterday's number changed. Why?

Because one of the facts behind it changed. A past number never moves for no reason.

These are the common causes. You saved a cost with an earlier start date, so every day from that date is priced again. An order changed in Shopify after its day, for example it was cancelled, edited or marked as a test. Late details of an order arrived, like the fee Shopify reports for a payment, or the parcels it shipped in. Or an ad platform corrected its spend for that day. nouz reads the last 30 days of ad spend again on every sync.

A refund does not change a past day. A refund made today counts on today, not on the day of the order. That is why most past days stay exactly as they were.

There are three rarer causes. A new timezone for your store can move orders near midnight to the day next to them. An order in another currency that could not be converted is converted by a later sync. And a nouz update that fixes how a line is calculated recalculates the days it affects.

While a change is being applied, the pages it affects say Updating the numbers. If a number moved and none of this explains it, tell us. A number that changes without a reason is not one we want you to have.