Throughout the course of this week, OKEx will be rolling out support for Tezos deposits, withdrawals and trading against Bitcoin and Tether
Source: https://cointelegraph.com/news/crypto-exchange-okex-is-listing-tezos-with-bitcoin-tether-pairs
Crypto Exchange OKEx Is Listing Tezos With Bitcoin, Tether Pairs
November 4, 2019
CoinTelegraph