No, OKeX have been out found to be practice wash and fake volume trading, read the latest report below, (https://www.blockchaintransparency.org/). Binance and Bitfinex are the only two exchanges found not doing those fraudulent procedures and that is why Binance remain the most trusted exchange so far. They probably wanted to show that they have volumes to enticed traders, so for those newbie traders, just used your due diligence and research which exchanges you really wanted to register and do your trading activity as you might be a victim of fake volumes and potentially lose your funds or capital.