TradeStation Help
This is a Japanese equities option that allows you to place a limit order that, if unfilled by the end of the active session, will automatically change to a Market order at the close of that session.
This Advanced setting is available only for use with Day, AM, and PM durations.
For example, if a limit order is placed in the morning (AM session) with a duration of Day (or AM) and is not filled by the end of the AM session, it will become a Market order at the close of the AM session.
In another example, if a limit order is placed during in the afternoon (PM session) with a duration of Day (or PM) and is not filled by the end of the PM session, it will become a Market order at the close of the PM session.