Market orders in the futures market are designed to execute immediately. In fast markets or thin liquidity, a market order can fill across multiple price levels and result in excessive slippage, meaning the final fill price is much worse than expected.
To reduce this risk, many futures platforms apply Market Price Protection. This risk control limits how far a market order is allowed to execute away from a reference price, so users are less likely to get filled at extreme prices during abnormal market conditions.
I. Mechanism Overview
Market Price Protection sets an acceptable execution range for market order fills. If the estimated fill price is outside that range, the system will restrict the order rather than allowing it to execute at an unreasonable price.
The goal is to protect users from abnormal fills that can occur during sudden volatility or price gaps, rapid drops in order book depth, temporary liquidity shortages, or sharp bursts of market buying or selling pressure.
II. Scope of Application
Market Price Protection applies when an order will execute as a market order, including:
- Market Orders
- Stop Market Orders after the stop condition triggers and the order converts to a market order
- Plan or Trigger Orders where the execution leg is a market order after the trigger activates
If an order executes using the market mechanism, it can be subject to Market Price Protection.
III. Trigger Logic and Execution Method
Before matching a market order, the system evaluates execution risk using the mark price, order book depth, and real time volatility. The process works as follows:
Set the Protection Range
Based on the current mark price, the system defines a protection band by setting an upper price limit for buy orders and a lower price limit for sell orders.
Estimate the Execution Price
The system reviews current order book liquidity and estimates the expected average fill price for the order based on how it would match against available depth.
Assess Risk and Apply Protection
If the estimated execution price falls outside the protection band, such as a buy order estimating above the upper limit or a sell order estimating below the lower limit, the system identifies a high risk of abnormal slippage and triggers Market Price Protection.
After protection is triggered, outcomes may include:
- Cancel the order: The order will not execute.
- Partial fill, then cancel the remainder (IOC behavior): Any portion that can be filled within the protection band will execute, and the rest will be canceled.
Protection behavior may vary by trading pair to reflect differences in liquidity and volatility.
IV. FAQ: Why Can Stop-Market Orders Be Canceled After Triggering?
After a stop condition is triggered, a stop market order converts into a market order and is sent to the matching engine. In certain situations, the system may cancel the order to prevent an abnormal fill. This can happen when the market is moving rapidly, when order book liquidity drops sharply, or when the estimated execution price falls outside the Market Price Protection range.
If the platform forced execution under these conditions, the order could fill at an extreme price, such as selling far below the mark price or buying far above it, which may result in significant and unexpected losses. Canceling the order in these cases reflects normal risk control behavior designed to reduce extreme slippage.
V. Operational Recommendations
To better manage execution risk in the futures market, consider the following:
- Use stop limit orders when possible. A stop limit order lets you set the worst acceptable execution price, which helps avoid unfavorable fills caused by slippage.
- Monitor volatility and liquidity. Use extra caution with market orders during major news events, periods of high volatility, or when the order book is thin.
- Set trigger prices with a reasonable buffer. Increasing the distance between your trigger price and the mark price can reduce the chance of cancellation caused by Market Price Protection.
VI. Contact Customer Support
If you have questions about order cancellations, execution behavior, or the trigger conditions for Market Price Protection, please contact us through one of the following channels:
- Online Customer Support
- Support Ticket System
- Official Community Channels
Our team can assist you and help review your order details.