Order Columns

The columns to the far left and the far right of the ladder are the order columns. 

When you drag a price to either column, a visual representation of your order is displayed.  Please see DOMTrader Order Status Icons.

These columns are always displayed.  Watermarks, seen here as STP and LMT, are optional.    To display watermarks, go to Setup > Preferences > Order Placement and select the Show watermark check box and then select either Order Quantity, Buy/Sell, or Limit/Stop mode. 

Trade Sequence check box.