Every figure on this site is an observation with a timestamp on it. Nothing here is interpolated, averaged into existence, or filled in to make a chart look complete.
No accessible source publishes EA FC price history. The endpoints that exist give you a price now — ask again in an hour and you get that hour’s price, with nothing said about the one before it. So the history on this site exists because a machine has been asking, on a fifteen-minute loop, and writing down every answer.
The consequence is worth being direct about: there is nothing to backfill. A card’s series starts the first time our collector saw it. For a card added last week, the chart is a week long, and that is not a gap in the data — it is the data.
It also means the long windows fill in over time rather than all at once. A 7-day change needs an observation seven days old to measure against; until the collector has one, the panel says “no anchor yet” instead of measuring against a shorter window and printing it under a 7D label.
A percentage change is only meaningful next to a real price. Without a floor, a movers table fills with cards that went from a couple of hundred coins to a couple of thousand and therefore “rose 900%” — arithmetically true, and useless. Both the current price and the price it is measured against carry a 5,000-coin floor. What survives is a card that was worth something yesterday and is worth something different today.
There is no catalogue size, no card count and no “over N players” anywhere on this site that was written into the copy by hand. Every one of them is read live at the moment the page is built. A number frozen into marketing text becomes a claim the product keeps asserting long after it stopped being true.