BTC 24 hours, according to data recently cut open more proportion was 50.76% in volume contract, open air ratio was 49.24%, the mainstream contract exchange, Huobi quarter to 51.51% more, open air ratio is 48.49%; OKEx quarter to 48.85% more, open air ratio is 51.15%; BitMEX contracts to 52.41% more, open air ratio is 47.59%,