Kucoin has earned a good reputation as a crytpocurrency exchange. But its trading volume is very low. What is the main reasons behind it. Though it is a new exchange, ETH/BTC 24h volume is 2.2 m where HitBTC volume is BTC/USDT 68m and ETH/BTC 27m.
Obviously not many traders are using Kucoin, as per coinmarketcap: (Per 24 Hour Trading Volume)
7. HitBTC
38. Kucoin
Hitbtc is among the top 10 exchanges around, although if you are going to look around the forum there are a lot of scam accusations against them. Just like you said Kucoin is fairly new, maybe it still hasn't gain the trust as of now that's why not much trading is going around on their exchanges.