moomoo US Help Center-What is a trailing stop order
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What is a trailing stop order

A trailing stop order allows investors to set a "trailing amount" or "trailing ratio" so that the system continually calculates the stop price as the market fluctuates. When the stop price is hit, a buy/sell market order will be submitted. A stop order is not guaranteed a specific execution price and may execute significantly away from its stop price.

The order follows the "buy high and sell low" rule. The trailing amount or ratio should be greater than 0.


1. Example

● Buy trailing stop order

Assuming stock XYZ has a current price of 10, you submit a buy trailing stop order with a 50% trailing ratio. So, the order's initial stop price will be 15 (10+10*50%). When the market price falls, so does the stop price; when the market price rises, the stop price doesn't change. A buy market order will be submitted as soon as the stop price is hit.

Before the buy order fills, if XYZ's market price falls to as low as 8, the stop price will be adjusted to 12 (8+8*50%). When XYZ's market price rises to 12, a buy market order will be submitted automatically to the clearing broker and filled at the market price. 

● Sell trailing stop order

Assuming stock XYZ has a current price of 20, you submit a sell trailing stop order with a 5  trailing amount. So, the order's initial stop price will be 15 (20-5). When the market price rises, so does the stop price; when the market price falls, the stop price doesn't change. A sell market order will be submitted as soon as the stop price is hit.

Before the sell order fills, if XYZ's market price rises to as high as 30, the stop price will be adjusted to 25 (30-5). When the price falls to 25 or lower, a sell market order will be submitted automatically to the clearing broker and filled at the market price. 


2. Order time 

Clients can place orders at any time via the app. 


3. Time-in-force     

Clients can set the order's Time-in-force. If the order is not filled in full, the unfilled portion will be canceled automatically by the system. If the order fails to be executed due to risk management or other reasons, the order status will update to "failed," and the system will not continue to place the order.


4. Trigger time

If the order reaches the trigger condition during the allowed trading period set when the user places the order, the order is triggered and the system automatically submits the preset order to the upstream. If the order reaches the trigger condition outside the allowable trading period set when the user places the order, the order will not be triggered. Enter the set allowable trading period, and then judge the trigger condition.

If the order reaches the trigger condition during the preset trading period, the system will automatically submit the order to the clearing broker. The trailing stop order will not be triggered if the trigger condition is met outside the preset trading period.


5. Stop price

● Buy trailing stop order

If the trailing amount is set,

Initial stop price = initial market price + trailing amount

Adjusted stop price = the best price of a stock before triggering a market order + trailing amount

If the trailing ratio is set,

Initial stop price = initial market price * (1 + trailing ratio)

Adjusted stop price = the best price of a stock before triggering a market order * (1 + trailing ratio)

● Sell trailing stop order

If the trailing amount is set,

Initial stop price = initial market price - trailing amount

Adjusted stop price = the best price of a stock before triggering a market order - trailing amount

If the trailing ratio is set,

Initial stop price = initial market price * (1 - trailing ratio)

Adjusted stop price = the best price of a stock before triggering a market order * (1 - trailing ratio)


6. Notes

6.1 After the trailing stop order is triggered, there is no guarantee that the order will be successfully placed. Reasons such as insufficient buying power and positions will cause a failure to place the order.

6.2 After the trailing stop order is triggered, the system will place a market order automatically as soon as the stop price is hit. However, there is no guarantee that the order will be filled. If the order is not filled during the Time-in-force, it will be canceled automatically by the system.

6.3 After the trailing stop order is triggered, whether it is filled or not, the trigger conditions will not be effective again. Please place a new order if necessary.

6.4 After the trailing stop order is triggered, the system will place a market order. For clients' convenience, the order details will be displayed in the original trailing stop order.

6.5 After the trailing stop order is triggered, the system will submit the order only when the client has enough maximum buying power on the account, and financing may be applied. 

6.6 Trailing stop orders are only accepted if they close open positions. If the order quantity is greater than the current position, the order will not be executed. 

6.7 The trailing stop order will only be triggered during regular trading hours.

6.8 Advanced orders are simulated by Moomoo Financial Inc. based on the basic orders and are irrelevant to Exchanges' advanced orders. Please refer to the actual order page for more details.

6.9 The system will use a specific quote data source as the quote price monitoring standard, for example, the U.S. stock is based on UTP quotes for price monitoring, the performance of Basic quotes may be different from UTP quote.

Moomoo is a professional trading app offered by Moomoo Technologies Inc. In the U.S., investment products and services on Moomoo are offered by Moomoo Financial Inc., Member FINRA/SIPC.

Any illustrations, scenarios, or specific securities referenced herein are strictly for illustrative purposes. Past investment performance does not guarantee future results. Investing involves risk and the potential to lose principal.