The teal line is what the wheel takes: 2.70% of everything you stake, spin after spin, no exceptions. The pale line is you. The gap between them is luck — and luck is the only thing here that ever changes direction.
Every system below is just a rule for sizing your next stake after a win or a loss. Pick a bet, pick a rule, and run it across thousands of sessions. Two numbers come back: how often it wipes you out, and what fraction of everything staked the house kept. The first varies enormously. The second does not.
The trigger setting is for the most common instinct at a real table: the first dozen hasn't come in seven spins, it must be due. Set it to wait for a drought and the simulator sits out exactly like you would, then bets when the drought hits your number. It reports how often the bet landed on those hand-picked spins, next to how often it lands on a spin picked at random.
The pocket order isn't random. Colours alternate the whole way round, you never meet three consecutive low or high numbers, and each half of the rim sums to 333. It's a beautifully balanced instrument — which is exactly the point. The wheel is honest. The payouts are where the money is taken: a number hits once in 37 and pays 35 to 1.
Hover anything on the felt and it tells you its own expected return. Build the most elaborate combination you can think of; it is −2.70% every time, because every bet on this table satisfies the same equation — numbers covered × (payout + 1) = 36 — on a wheel with 37 pockets. The missing pocket is the house.
Play money only. If gambling has stopped being entertainment for you or someone close to you, the National Council on Problem Gambling runs a free, confidential 24/7 helpline in the US on 1-800-522-4700.