Step by Step: One $100 Evening for Red
One hundred dollars, five-dollar chips, red for every spin, and one stop rule. Spin by spin.

One evening wey we simulate for live table: up to 60 spins of $5 on red from $100 budget, with $50 stop-loss and $50 stop-win. Di stop-loss end am for spin 36. Di session show how variance dey look as e dey happen, and why di stop rule na di only decision wey matter.
Di Plan
Best roulette strategy dey for $100? No one wey fit reduce di average cost. Dat budget na moni wey we fit lose; wetin we dey choose na di stake and di stop rules. Stake $5, 5% of di budget, and e give us about twenty losing bets for hand. Stop-lossstrategyStop-lossOne amount of loss wey you set before, wey you go end di session when you reach am.Read di whole tin → for −$50 and stop-winstrategyStop-winOne profit target wey you set before, wey you go end di session when you reach am.Read di whole tin → for +$50, and we decide am now. Expected lossmathsExpected lossExpected value times di total moni wey you bet; di average amount wey you go lose for one session or one period.Read di whole tin → for 60 spins na 60 × $5 / 37 = $8.11. We expect to comot with about $92, and with reasonable probabilitymathsProbabilityDi chance of one outcome, from 0 to 1 or from 0% to 100%. One number: 1/37 = 2.70%.Read di whole tin → we fit dey anywhere between $20 and $170.
Spins 1–20
R B B R R 0 B R R B R B B B R R B R B R. Ten redsbetRedEven-money bet on di 18 red numbers. For French: rouge.Read di whole tin →, nine blacksbetBlackEven-money bet for di 18 black numbers. For French: noir.Read di whole tin →, one zerowheelZeroDi one green pocket wey no even-money, dozen or column bet dey cover; na im be di source of di house edge. Dem also dey call am: single zero, 0.Read di whole tin →: +$50 − $45 − $5 = $0. Balance na $100. Di zero for spin 6 cost one chipmoniChipToken wey stand for one fixed amount, wey you put on top di layout to make bet. Dem also dey call am: check.Read di whole tin → and, for 1/37, e come small early. Notin here strange. We dey level afta twenty spins.
Spins 21–36
B B B B B R B B R B B R B B B B. Five blacks for di start, thirteen in total: three reds, thirteen blacks, +$15 − $65 = −$50. Balance na $50. Na dis kind stretch dey make pipo change dia bet, double up or change colour. Di probability of 13 or more blacks for 16 spins no reach 1%; e must happen to somebody tonight. We don lose $50 from di start, di stop-loss fire for spin 36, and we stand up.

Spins 37–60, Without Us
R B R B, then R R B R 0 R B R R B R R B B R R B R B R. Fourteen reds, nine blacks, one zero: if we stay, e for be +$70 − $45 − $5 = +$20 and balance of $70 for spin 60. Thirty-six spins for live table na about 45 minutes. We comot with $50, $50 down, when di expected for 36 spins na −$4.86. Thirteen reds, twenty-two blacks, one zero.
- p10 −$100
- p25 −$100
- median −$100
- p75 +$0
- p90 +$70
Wetin Happen
We pay about $5 for 45 minutes of roulette, plus $45 of bad luck. Thirteen reds for 36 spins dey well well below di 17.5 wey we expect, and nine reds wey short pass di blacks na −$45 before di zero. Na variancemathsVarianceOne measure of how wide di results dey spread around di expected value. E high for straight up, e low for even-money bets.Read di whole tin → decide di evening; di stake and di spins decide di price; di stop-loss decide when e end. If we stay, we for recover $20 by spin 60, and dat one no be reason to stay: di recovery na variance too, and na so di black run wey come before am be.
Wetin We No Do
Change di stake afta loss (dat one na progressionstrategyProgressionAny rule wey dey change di stake based on di results wey don pass. Negative progressions dey raise am afta losses, positive ones afta wins.Read di whole tin →, and e dey raise turnovermoniTurnoverDi total moni wey you bet for one session or one period, including winnings wey you bet again. Dem also dey call am: handle, action.Read di whole tin →). Change colour afta di black run (di odds na di same). Stay pass 60 spins becos we “almost level” (dat one na to renegotiate di stop-loss). Bet on di dozenbetDozen1–12, 13–24 or 25–36, e dey pay 2:1.Read di whole tin → wey “never show” (na di same edge, different shape). Every one of dem for change di shape of di evening, but no one go change di expected cost.
Questions wey pipo dey ask
Twenty chips for hand instead of ten. Di evening go last; di cost for every spin go reduce by half.
Expected loss for be $4.05 instead of $8.11. Yes.
Sign of notin. Thirteen blacks for sixteen spins dey happen about one evening out of 125.
Small laugh

Di stake and di spins set di price. Di wheel set di mood.
Sources
- Ethier, S. N. The Doctrine of Chances: Probabilistic Aspects of Gambling.