In trading, confirmation refers to a signal or indication that supports a particular trading decision. It is a step that traders take to ensure that they have the best possible information to make an informed trading decision. A confirmation can come in many forms, such as a technical indicator or a news event, and it is used to validate a trade idea or signal. For example, a trader who uses technical analysis may wait for a confirmation signal before entering a trade, such as a moving average crossover or a break of a key support or resistance level.