General Info

The rules for placing orders at the exchange level are as follows:

• The maximum number of pending orders (including post only orders, limit orders and taker orders that are being processed): 4,000

• The maximum number of pending orders per trading symbol is 500, the limit of 500 pending orders applies 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:
    • Take Profit / Stop Loss (TP/SL)
    • Trigger
    • Trailing stop
    • Arbitrage
    • Iceberg
    • TWAP
    • Recurring buy

• The maximum number of pending spread orders: 500 across all spreads

• The maximum number of pending algo orders:

  • TP/SL order: 100 per instrument
  • Trigger order: 500
  • Trailing order: 50
  • Iceberg order: 100
  • TWAP order: 20

• The maximum number of grid trading

  • Spot grid: 100
  • Contract grid: 100

The rules for trading are as follows:

• When the number of maker orders matched with a taker order exceeds the maximum number limit of 1000, the taker order will be canceled.
  • The limit orders will only be executed with a portion corresponding to 1000 maker orders and the remainder will be canceled.
  • Fill or Kill (FOK) orders will be canceled directly.

The rules for the returning data are as follows:

• code and msg represent the request result or error reason when the return data has code, and has not sCode;
• It is sCode and sMsg that represent the request result or error reason when the return data has sCode rather than code and msg.

instFamily and uly parameter explanation:

• The following explanation is based on the BTC contract, other contracts are similar.
• uly is the index, like “BTC-USD”, and there is a one-to-many relationship with the settlement and margin currency (settleCcy).
• instFamily is the trading instrument family, like BTC-USD_UM, and there is a one-to-one relationship with the settlement and margin currency (settleCcy).
• The following table shows the corresponding relationship of uly, instFamily, settleCcy and instId.

Note:

1. USDⓈ represents USD and multiple USD stable coins, like USDC, USDG.
2. The settlement and margin currency refers to the settleCcy field returned by the Get instruments endpoint.