Methodology

Where our information comes from and how we check it.

Last updated Oct 9, 2026

This page explains where our information comes from and how we check it.

Articles

Every news story and report lists its sources at the end. When a story uses numbers, the article keeps a copy of them as they were when it was published, so you can see what the writer saw.

Market numbers

Market numbers come from public blockchain data that we collect ourselves, chain by chain, and from the marketplaces' own data services. We count every sale at its dollar value when it happened, so sales on different chains add up fairly. Amounts in a chain's own coin are added up only within that chain, and a sale we cannot price is left out of the volumes and counted apart.

Next to every number we show its source and when it was last updated. If a number is late, we say so instead of passing off an old figure as current. A chain we do not read yet says so and never shows zero; the list at the end of this page shows what we have for each chain.

Mistakes

If you think a number or a fact is wrong, tell us through the contact page. We fix mistakes in the open and list every correction on the corrections page.

Coverage by chain

We add up amounts from different chains only in dollars, each sale at its dollar value when it happened. A chain without figures is left out of the By chain table on the market page instead of showing zero.

Ethereum: Figures coming soon
Bitcoin: Figures coming soon
Solana: Figures coming soon
Polygon: Figures coming soon
Base: Figures coming soon
BNB Chain: Figures coming soon
Immutable: Figures coming soon
Flow: Figures coming soon

Where sales come from

We read sales straight from the blockchain, from the marketplaces below, and keep the sales of the collections we track. Sales on other marketplaces, and NFTs that change hands outside a marketplace, are not counted.

Solana: Magic Eden and Tensor
Ethereum: OpenSea, Blur and Other Seaport sites
Base: OpenSea, Other Seaport sites and Beezie
Polygon: OpenSea and Other Seaport sites

Seaport. On Ethereum, Base and Polygon, OpenSea and many other sites sell through the same contract, Seaport 1.6. We tell OpenSea and Beezie sales apart by the order’s zone, a field that names the site that took the order, or by the fee the order pays OpenSea; the rest count as Other Seaport sites.
Blur. On Ethereum we also read Blur’s own contract, bids paid from Blur Pool included.
Free transfers. An NFT given away, or moved between wallets without a payment, is not a sale.
Sales we skip. We leave out an order that sells several different NFTs at once, a sale paid in more than one coin, and a sale paid in a coin we have no dollar rate for.

Dollar rates

Dollar prices of NFT sales, and the coin prices at the top of the page, come from Chainlink price feeds, which we read every few minutes and store. A sale gets the last rate of its coin at or before the moment it happened. Chainlink rates are reference prices, not the price on one exchange, so dollar amounts are approximate.

How long each coin’s rate can price a sale
Coin	Feed on	Valid for
ETH	Ethereum	66 minutes
BTC	Ethereum	66 minutes
IMX	Ethereum	26 hours 24 minutes
USDC	Ethereum	25 hours 18 minutes
USDT	Ethereum	26 hours 24 minutes
SOL	Polygon	5 minutes 27 seconds
POL	Polygon	5 minutes 27 seconds
BNB	BNB Chain	5 minutes 27 seconds

Too old. A rate is valid for the longest gap Chainlink promises between two updates of its feed, plus 10% and at least 5 minutes. A sale with no valid rate has no dollar price yet and stays out of dollar figures. When a rate arrives, the sale is priced and the figures for its day are counted again.
Stablecoins. USDC and USDT sales use their own Chainlink rate, not a fixed $1.
FLOW. There is no Chainlink feed for FLOW yet, so sales in FLOW have no dollar price.
Figures wait for rates. We publish figures only up to the moment we have both the sales and the rates for. A late rate shows as “Delayed”, never as a drop.
Coin prices. The ETH, BTC and SOL prices on the homepage and the market page are the latest rates we stored. A price more than 2 hours old shows as a dash.

Top sales

The Top sales carousel on the homepage and on each chain page lists the highest NFT sales of the last 24 hours, at most 10 sales, from the collections we track.

What counts. A clean sale, priced in dollars, from a collection without the suspect volume label. Clean means our suspect sale rules did not flag the sale. They catch the usual cases, not every one. Sales we could not price never count. A sale of several copies of one NFT in one go is left out too, because its price pays for all of them.
One card per NFT. Each NFT shows once, with its highest sale, and there are at most 3 cards per collection, so one busy collection cannot fill the list.
The median line. A card can say “2.4× the 7-day median”. It compares the price with the median of the collection’s clean single-copy sales over the last 7 days. It shows only when the collection had at least 10 such sales and the price is at least 1.5× the median. We use the median, not the average, because one huge sale cannot skew it.
Times. The 24 hours end at the last update of our sales data, and the carousel shows that time, in UTC. It also says how many sales in them were over $1,000, and it says “Delayed” when that end time is more than 30 minutes old.
Images. We copy NFT images to our own server and never load them from other sites. We show them only for collections our team has checked, and we keep the address each image came from. Otherwise the card shows the collection’s logo. Images belong to their creators: to ask us to remove one, write to us through the contact page.
Hidden NFTs. Our staff can hide an NFT, for an unsuitable image or at the request of its owner. It stays hidden when it sells again.

The carousel shows only when at least 3 sales remain after these rules, and not at all once its end time is more than 48 hours old.