Some settings or systems may wish to add additional Traits. Before you do this, carefully consider whether or not the measure you are seeking cannot be represented by the primary four. If not, give the new Trait a name and description, provide reasonable limits. As an example, consider Luck.
Luck is a measure of the character's ability to be in the right place at the right time. Outcomes of random occurrences are clearly governed by the Luck trait. Less obviously, intuition is also governed by Luck. When faced with a choice and no information, a character with a high Luck trait will tap into a 'gut feeling' and sometimes gain a subconscious insight.
In the Consensus game setting, Luck is a combination of subconscious, preconscious, and unconscious knowledge. It represents a collection of ongoing premonition, a blurry window into the universal unconscious, and an awareness of instinctual drives that converge in something that, to the outside observer, appears to be happenstance.