If you leave this at zero the simulations will keep going even when you're losing. In other words, it just shows you examples of how your balance can change over time when playing roulette, and how different the projected results can be depending on how lucky you get.
The results are random, and they simulate the same expected results you would get when playing online roulette or live roulette. The chart shows multiple simulations where you make the same type of bet with the same amount of money over a specified number of spins. This tool shows how much you might win or lose playing roulette.
