How to Transfer from OKEX to Polygon (MATIC) Step 1 — Selecting the Coin(https://www.okex.com/balance/withdrawal) OKEx’s Polygon integration supports BAL, BAT, CEL, COMP, CRV, DAI, ETH, GHST, GUSD, LINK, MKR, PAX, SNX, SUSHI, TUSD, UNI, USDC, USDT, USDK, wBTC, YFI, YFII, ZRX. Step 2— Selecting the USDT or Others