Did It Work?
You now have three Monte Carlo simulations of Brownian motion. The first gradually moves some particles out of the bag. They start in the middle and gradually disperse as the figures show. They will either bump into the sides or breakthrough depending on the value you used for breakout. If they are allowed through the sides, some will sneak back in again from time to time. Because they stop moving when they get above the bag, you will end up with a line near the top of the window, as shown in the figure on the right:
The stock price simulation has many more parameters. A simulation with time steps of 0.01, a drift of 0.2 (yes, a ...
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