Adjustment to pending order limit for OKX trading symbols

Dear OKX users,
 
In order to maintain the stability of the trading system and provide users with a faster and better trading experience, OKX will limit the number of pending orders per trading symbol starting from 8:00 am UTC on August 14, 2023. After the adjustment, the maximum number of pending orders per trading symbol will be 500. For example, for the perpetual swap contract BTC-USDT-SWAP, the futures contract BTC-USDT-230707, and the spot BTC-USDT, each will support a maximum of 500 pending orders. The existing rules for options trading will not be changed.
 
For users who have more than 500 orders for a trading symbol, the new limit will not affect existing orders. However, users will not be able to place new orders for that trading symbol until some of the existing orders are filled or canceled so that the number of pending orders for the trading symbol is below the limit. The limit of 500 pending orders will apply to the following order types:

• Limit
• Market
• Post only
• Fill or Kill (FOK)
• Immediate or Cancel (IOC)
• Market order with Immediate-or-Cancel order (optimal limit IOC)
• Take Profit / Stop Loss (TP/SL)
• Limit and market orders triggered under the order types below:
  • Trigger
  • Trailing stop
  • Arbitrage
  • Iceberg
  • TWAP

API users will receive the error code "51174" when they exceed the pending order limit .
 
Thank you for your understanding and support.
 
OKX team
 
July 11, 2023