Then, according to this example, if the trader selects to use spread units, the LTQ of the spread would be displayed as a 1, but if the trader selects to use the highest common integer factor, the LTQ of the spread would be displayed as 10 (because the highest common integer factor of the 100/70 spread is 10). [0106] Furthermore, in another embodiment, color coding or other indicators may be utili