Expand Button

If your DOMTrader is sized so that not all of the buttons are visible, an expand button will appear on the right side.  Clicking this button will display the hidden components, in this case, the OCO button.  To display the hidden component, click on it, then click on the DOMTrader to the left of the expand button.  The hidden component will then replace one of the other components.  To see all components, resize your DOMTrader.