I assume the OP's question has been answered but I will sum things up for the OP.
There is a lot more to card counting than counting cards. The is money management (a combination of EV, CE and variance), risk management (RoR or Risk Of Ruin) and the number of rounds needed to be played to increase certainty enough that you are no longer gambling (n-zero or n0 or it's equivalent inversely proportional stat SCORE gives some sort of idea for comparison. n0 is the number of rounds needed to be played for EV to exactly equal or surpass the standard deviation for that number of rounds). Your simulator calculates the optimal ramp to maximize all these aspects of the game. For any deviation from the plan it can be assumed will cause your stats to become less optimal.
Counting works because EV, expected value, grows linearly as rounds accumulate while SD, standard deviation, grows in proportion to the square root of the number of rounds played. Even though SD starts around 10 times EV with few rounds played, as you play more rounds EV approaches and even surpasses SD for the number of rounds played. Results will fall within the bell curve percentages from EV as defined by SD:
https://www.mathsisfun.com/data/imag...tion-large.svg
As you play more rounds EV will grow faster than SD so the 0 EV point on the bell curve will walk further and further to the left as you accumulate rounds. The effect is you are more and more likely to show a profit as rounds accumulate. When you reach n0 rounds the zero point is at -1 SD. Since SD grows with the square root of rounds played at 4*n0 the 0 EV point will be at -2 SD's. Similarly the EV = 0 point will be at -3SD after 9 times n0 rounds. In this way counting works over time if you follow your game plan.
If you stack your surrender money on your bet n0 will get larger which will hurt the likelihood you will be ahead over time which is the most important statistic. Your EV will go up if you stack it but as you can see the way certainty is an exponential function of rounds played the cost to certainty is worse than the gain of EV. As certainty is reduced you must play far more rounds to get to a point you aren't gambling and the stats work to make you a likely winner.
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