Every price on this site is recorded from one of the sources below. Each entry is a source market: a retailer whose public retail pages we observe and record, with the coverage and limits of each stated on its own card.
Prices on this site come from one retailer. They are recorded prices, not a national survey or official statistics.
Recorded from this retailer's public pages. Coverage is what we have actually observed, not the retailer's full range, and no endorsement or affiliation is implied.
One dot for each observation date in the current export. Dates with too few products are shown, but they are not used for comparisons.
More data sources may be added in future. Each one will get its own card on this page, with its own coverage note. None are listed yet.