For now, the service will offer price information and order books for 15 cryptocurrency exchanges (or almost 80 percent of major
trading volume), and at
least initially, the data feed will include
bitcoin, Ethereum, Litecoin, Dash, Ripple, and
bitcoin cash.
A large concentration of exchange -
traded volume typically occurs in China's «Big Three»
bitcoin exchanges: BTCC, Huobi and OKCoin (at
least, before they recently announced sweeping policy changes).