설명
⋅ spot_volume / tether_volume
spot = Coinbase + bitFlyer + Kraken + Bitstamp
tether = Bitfinex + binance + Huobi + HitBTC
릴리즈 노트
⋅ make MA volume weighted
릴리즈 노트
⋅ fix nothing displayed if only one exchange has no data for the given time
릴리즈 노트
⋅ add (Spot + Tether) / BitMEX ratio