Updates to MMR, Fees Calculation, and Order Liquidation

We’ve introduced key platform updates to improve risk management and trading efficiency. Here’s what’s new:

Changes to Maintenance Margin Requirements (MMR)

To enhance the stability of margin trading, the MMR is increasing from 2.5% to 3%. Traders must now maintain a minimum ratio of free funds to borrowed funds of at least 3%. More details on position liquidation are available in our Help Center.

With this update, the liquidation mechanism is also changing: liquidation will be triggered if a trader’s Margin Fraction (MF)drops to 3%. This adjustment helps minimize risks from high leverage and ensures a more stable trading process.

Changes to Order Processing & Fee Calculation

To provide a fairer and more accurate fee structure, we have implemented the following changes:

Fees apply only to executed orders or their completed parts – This means you will only be charged for the portion of your order that is successfully executed.

No fees for unexecuted orders – No trading fees will be applied if your order is not executed.

These changes allow traders to better calculate their trading costs and prevent unnecessary charges on orders that do not go through.

Additionally, the maker_fee and taker_fee fields will be removed from API responses for certain key methods. This simplifies data processing for API users and aligns with the updated fee structure.

New Spot Trading Fee Mechanism:

Buy Orders: Fees will be charged in the base asset (e.g., buying BTC in BTC/USDC → fee in BTC).
Sell Orders: Fees will continue to be charged in the quote asset (e.g., selling BTC in BTC/USDC → fee in USDC).

Automatic Order Cancellation at Margin Call Level

A new system will automatically cancel open orders when the Margin Call level is reached, helping to:

Free up funds to support negative positions before liquidation
Reduce the risk of immediate liquidation
Give traders more control over their portfolios

These updates enhance platform efficiency and provide traders with better control over their positions. We encourage you to review and incorporate the new rules into your trading strategies.