CoinMarketCap

Coinmarketcap is a website for tracking capitalization of various crypto currencies. The page provides various data about several listed coins, such as their price, available supply, trade volume over last 24 hours or market capitalization. The statistics are updated every 5 minutes. Market capitalization is calculated by multiplying price by total supply. Prices are calculated by averaging the prices at the major exchanges weighted by volume. Coins with stale data points (more than 6 hours old) are shown at the bottom of the list with question marks and are de-listed after 7 days.