Market-data services collect trading information from many venues and turn it into reference prices, charts, rankings, and statistics. Their numbers are estimates built from a methodology, not a single universal market tape.
Price, volume, and market capitalization
An aggregated price combines selected trading pairs from selected exchanges. Reported volume attempts to measure trading over a period, while market capitalization usually multiplies a reference price by an estimate of circulating supply.
A large market capitalization does not mean that the same amount of cash entered the asset or could leave at the displayed price. Liquidity and order-book depth answer different questions.
Every aggregate depends on a methodology
Providers choose exchanges, pairs, weighting methods, supply figures, and filters. Those choices can produce different prices, volumes, and rankings from the same broad market.
Why providers disagree
Providers may include different exchanges, exclude suspicious tickers, apply different outlier rules, or use different supply data. Fast markets also create timing differences.
Read the methodology and compare the underlying market before acting on a number. A ranking is a useful index, not an audit or endorsement of a token or exchange.
Reported volume needs context
A large number may include thin markets, incentives, or venues with different quality controls. Compare methodology and liquidity instead of treating one aggregate as exact.
Sources
Educational information, not investment advice.