A Time in Force designation that is similar to Fill-or-Kill (FOC). The difference being that All-or-None (AON) designated orders do not require an immediate fill, but instead remain open until the market closes on the day they are entered. AON orders must be filled in their entirety, and can be cancelled at any point during the trading day.
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All-or-None (AON)
This is a definition, not a recommendation. Options carry risk and can expire worthless. See how the desk actually trades at TrueTrader.