TradeStation Help
The If Touched advanced order parameter is used to specify a price that, when touched, will send the selected type of order to the market. This is only available for Market and Limit orders (including Auto Limit/Stop orders in the Matrix).
When Market is selected as the order type, then this order will become a Market If Touched (MIT) order as soon as a trade occurs at the If Touched price or better.
The market order will be sent as soon as the price is touched.
When Limit is selected as the order type, then this order will become a Limit If Touch (LIT) order as soon as a trade occurs at the If Touched price or better.
The limit order will be sent as soon as the price is touched but will be filled based on standard Limit policies.
For options orders, if touched orders are based on Bid or Ask prices rather than trades. When Market is selected as the order type, then this order will become a Market If Touched (MIT) order as soon as the Bid price drops to touch the If Touched price (Buy orders), or as soon as the Ask price rises to touch the If Touched price (Sell orders).