BitcoinChain.com provides with a reliable Bitcoin price indexes based on market data aggregated from the exchanges featured on our website. The indexes are available for the BTC/USD pair and can be viewed is calculated based on aggregated data.
The data is aggregated from the following exchanges: OKCoin, Kraken, Bitfinex, Coinbase, Bitstamp, HitBTC, Btc-E, Gemini, itBit .
The Average Price Index is obtained by taking the sum of all the prices at which trades have occurred, and then dividing by the total number of trades.
The VWAP Index is obtained taking the sum of all the prices, multiplied by the volume of the trade and then divided by the entire volume.