OKX US will retire selected USD trading books between 3 and 4 a.m. Eastern time on Sept. 30, canceling remaining orders and bots on those pairs. Traders can move orders and Grid or Smart Portfolio bots to corresponding USDC pairs, which have been available since Sept. 23. OKX says positions in Grid and Smart Portfolio bots will be sold, while positions managed by DCA, Recurring Buy and TWAP/Iceberg bots will be held even though those bots close. The automatic sales may create trading fees, slippage, and realized gains or losses. USDT-USD is exempt, and account balances, deposits, withdrawals and the ability to place USD orders are unaffected; USD orders will automatically convert to USDC for access to the new liquidity.