Techopedia explains
Pending Order
Pending orders are a standard way for forex traders to control their positions while they are away from their trading stations. A trader can set a specific threshold of loss or profit by using stop loss and take profit orders on a position, or even set up orders for entering or exiting a position.
In theory, combinations of orders can be chained together to automatically carry out a trader’s strategy, but this is difficult in practice due to the limitations of some trading platforms and the risk of execution errors. Instead, traders looking to automate their strategy usually depend on trading software set up to maintain, enter and close positions according to the set trading strategy. This allows the trader to create all-purpose trading rules rather than manually entering lists of pending orders with specific conditions.