What is Trigger-After-Close?
In cryptocurrency perpetual contract and delivery contract trading, "Trigger-After-Close" is a crucial risk management feature. It is typically an additional option for conditional orders (such as take-profit or stop-loss orders), with the core purpose of ensuring that when these conditional orders are triggered, the operation is limited to closing existing positions, thereby preventing the accidental opening of new, opposite-direction positions during market fluctuations or operational errors.

How Trigger-After-Close Works
When a trader selects the "Trigger-After-Close" option for a conditional order, the system treats it as an instruction specifically for closing positions. This mechanism has the following characteristics:
- Exclusively for closing positions: Once triggered, the order will only attempt to close the positions currently held by the trader.
- No additional margin required: Even with a low account margin ratio, as long as the order is for closing positions, it can usually be executed without the trader needing to provide additional margin.
- Automatic quantity adjustment: If the quantity specified in a "Trigger-After-Close" order exceeds the actual position size currently held by the trader, the system will automatically adjust the order quantity to exactly match the existing position, ensuring precise closure.
- Automatic cancellation when no position: If the order is triggered when the trader no longer has any open positions to close, the order will be automatically canceled, completely eliminating the possibility of opening a reverse position.
Distinction from Forced Liquidation

"Trigger-After-Close" and "forced liquidation" (often referred to simply as "liquidation") are two fundamentally different concepts:
- Trigger-After-Close: This is a risk management tool actively set by the user. Traders preset conditions based on their market judgment and risk tolerance to actively close positions, either to lock in profits or limit losses. It is part of a trading strategy, designed to exit the market as planned.
- Forced liquidation: This is a liquidation action enforced by the trading platform to control risk when a user's margin ratio falls below the maintenance margin requirement. It is usually an undesirable situation for investors, meaning that the trader's losses have reached the risk threshold set by the platform, and the platform takes this as a last resort to protect itself and market stability.
Importance and Application

The "Trigger-After-Close" feature is crucial for cryptocurrency contract traders. It provides an active risk control mechanism, helping traders maintain discipline in highly volatile markets and avoid additional risks caused by emotional trading or technical errors. By ensuring that take-profit or stop-loss orders are used only for closing positions, traders can set these conditional orders with greater confidence, knowing that they will not lead to unexpected new positions. Many mainstream cryptocurrency exchanges, such as Bybit, integrate this feature into their trading systems to support users in more refined risk management.





