Understanding How to Use CoinMarketCap.Com. First off, the main page to look at is the Cryptocurrency Market Capitalizations of All Cryptocurrencies (the home page). This page lists the market cap, price, volume, supply, 24 hour price change, and a graph of that price over 24 hours. Market cap is total coins in circulation plus the current market price. Price is… the current average market price across exchanges. Volume is how much of a coin was traded in the past 24 hours. Supply is how many are in existence (multiple that by the price and you get the market cap).