Now You Can Submit Orders Outside of Market Hours with Alpaca API

We are introducing the Order-Queuing feature in the Alpaca Trading API. Now you can submit orders outside of market hours! (Brokerage services are offered through Alpaca Securities LLC)

Submit & Queue Orders for the Next Market Open

As one of the many steps towards a more advanced trading platform, we are pleased to let you know that we have allowed everyone to submit and queue orders for the next market open.

Previously, your order-submission API calls while the market was closed were rejected, and we asked you to submit again after the market opened.

From now on, those API calls are accepted with a success status and the orders are routed to the marketplace at the next available time. This allows you to not only submit your orders the night before but also to submit “OPG” time-in-force order to participate in the market open auction.

You can always check our user documentation ( for how orders work at Alpaca.

Documentation | Alpaca
Alpaca API lets you build and trade with real-time market data for free.

Please do not be confused — this feature is not to allow extended-hours trading. Orders aren’t filled until the market’s next trading session. For extended hours trading, as well as other additional capabilities such as different order types, we are working on our backlog and hope to deliver these features as soon as they are ready.

Technology and services are offered by AlpacaDB, Inc. Brokerage services are provided by Alpaca Securities LLC (, member FINRA/SIPC. Alpaca Securities LLC is a wholly-owned subsidiary of AlpacaDB, Inc.

You can find us @AlpacaHQ, if you use twitter.