This can be done any number of ways, the simplest of which is to keep track of each and every session gain or loss. The reason we gamble is to give ourselves a chance to win money. Mathematics of the game suggests that over the very long haul, most players will have lost more than they have won. There is no question that, when playing craps, the only thing that is important is that the player be able to add the spots on top of each die when the dice come to rest after a toss. Depending on how the player has wagered, the end result seen will either make him happy or upset. We all know that by design, the game favors the house, not the player. This is because the house pays ALL winning bets unfairly, except for a few: (1) odds bets, (2) no vig, 2:1 payment on '4' and '10' , and (3) Field bet paying triple on both '2' and '12'. Two of these three "fair" wagers are so rare they may no longer exist anywhere. The "odds" of winning at craps are based entirely on the unfair casino payments, which includes vigorish. Simple mathematical formulas are used to determine how "well" a player has done. So-called DI's might say that these same formulas can be used to determine how "good" they are, and of course this is true, provided that the calculation is correctly done. I will come back to some examples using a few of these formulas later. What needs to be realized is that our bottom line when in the casino depends on every wager that we make and which goes to a decision. If multiple wagers are being made, the calculation for each is different, and depends on which wager was made. Obviously, calculated results made for one box number will be different than those for a different, non-sister box number. Maybe one of these calculations will show a result better than expected. Maybe not. The point is, the ONLY thing that matters when using math to calculate how a shooter is performing with respect to "expectation for the bet in question" is (a) the number of wagers made on the box number in question (b) the number of times the number shows, and (c) the number of hand ending sevens showing when these wagers were in action. Since I know that the baron can hardly wait, I will put up a few examples later.