TradeStation  Help
        
        Enabling Short Selling Preference
        To open and cover short positions, you must enable the Order Bar for short selling. For more information, see Order Entry Preferences - Equities-Trading. 
        
            - From the Menu bar, click File > Preferences > TradeStation Order Entry, or right-click on the Order Bar and choose Order Entry Preferences. The Order Entry Preferences dialog is displayed.
 
            - From the left pane, select Trading for the trade type.
 
            - Under Short Selling, select the Enable Short Selling check box.
 
            - Click OK.