Blackjack Is a Fluid Game
However, positive or negative is not really the question in casino. The most advantageous thing to do is to track the cards that effect the most overall change, be it positive or negative. Change is an absolute value, relative to what came before it. It doesn't matter whether it goes over, under, up, down or inside out, its still change. Therefore, in the columns on the far right, I've calculated what I call the Average Absolute Effect for each of the possible depleted card values. This is the sum of each line of figures from left to right, ignoring their positive or negative signs (this is called an absolute number), and dividing by thirteen (There are four cards worth ten, making thirteen.). I've taken these averages out to three decimal places to make it easier to view their differences.
