#Policy #30-Level #orderbook expansion

Dear Traders,

To provide a better trading experience, we are going to implement the following updates:

*These updates may affect how you get order book data via the Open API. Please make sure to review and update your query logic before 7 May 2025.

Schedule and Key Changes

• Impact:
  • The number of orderbook levels in the orderbook_units field of the Orderbook API (/v1/orderbook) will change from 15 to 30.
  • When receiving orderbook type data via WebSocket, the number of levels in the orderbook_units field will change from 15 to 30.
    • You can specify the number of units you want to receive using the codes field.
      • Format: {code}.{count}
      • Example: "SGD-BTC.1", "IDR-ETH.15", "THB-XRP.10"

Please Note

• Only the number of orderbook levels will change. The order-matching logic and tick sizes remain unchanged.

• Due to gradual deployment, the previous settings may remain active for up to 10 minutes after the announced time.

• Along with the expansion to the 30-Level orderbook, the market order rejection policy will also be updated:

  • Market Bid Orders

    • Before: Rejected if the order amount exceeds the total amount of ask orders from levels 1 to 15
    • After: Rejected if the order amount exceeds the total amount of ask orders from level 1 to 30

  • Market Ask Orders

    • Before: Rejected if the order quantity exceeds the total quantity of bid orders from levels 1 to 15
    • After: Rejected if the order quantity exceeds the total quantity of bid orders from level 1 to 30

If you have any inquiries, please contact us at [email protected]

Thank you.