OKEx is the top 1 Trading Volume Exchange as per Coinmarketcap and it has BTC market, ETH market & USDT market.
There are 480+ cryptocurrencies are listed in OKEx and the Most Trusted Digital Asset Exchange. There are some information given below about deposit, spot trading & withdraw about Ardor & Nxt :
Ardor( ARDR)
ARDR deposit - 16:00 Jun 25 (Hong Kong Time, UTC +8)
ARDR spot trading (BTC Market) - 16:00 Jun 26 (Hong Kong Time, UTC +8)
ARDR withdrawal - 18:00 Jun 29 (Hong Kong Time, UTC +8)
NXT (NXT)
NXT deposit - 16:00 Jun 25 (Hong Kong Time, UTC +8)
NXT spot trading (BTC Market) - 16:00 Jun 26 (Hong Kong Time, UTC +8)
NXT withdrawal - 18:00 Jun 29 (Hong Kong Time, UTC +8)