Roulette Bankroll Simulator
Most roulette tools show you spins. A bankroll simulator shows you what your money does between those spins. That is where the real story is: the slow grind, the sudden spike, the cliff edge where a progression system runs out of road.
The Roulette Strategy Tester includes a live bankroll graph for every run. This page explains how to read it.
What the bankroll graph shows
The graph plots your bankroll after every spin. The horizontal axis is spin number. The vertical axis is dollars. The dashed line marks the starting bankroll - everything above is profit, everything below is loss.
The graph colour also flips: green when bankroll is above starting, red when below. That makes losing streaks visible at a glance, even without reading the numbers.
Peak vs drawdown
Peak bankroll is the highest your bankroll reached during the run. Max drawdown is the largest peak-to-trough fall.
Peak is a feel-good number. Drawdown is the truth-teller. A strategy that peaks at $1,400 but drops back to $700 had a $700 max drawdown - that is the swing your nerves would have had to absorb in a real session. See Max Drawdown for more.
Bust vs blocked
A run is busted when bankroll cannot cover the next required bet. With progression systems, this often happens with money still left over. For example, a Martingale player who has lost 6 in a row on a $10 base bet needs $640 next - if they only have $370 left, the system is mathematically dead even though the bankroll is not zero.
The simulator marks this state explicitly so you do not mistake 'still has money' for 'still has a working strategy'.
Base bet to bankroll ratio
For flat betting, even a 5% base-bet-to-bankroll ratio is survivable. For Martingale, that ratio is a death sentence. The classic rule of thumb is to keep base bet under 1% of bankroll for any progression system.
Run the same strategy at 0.5%, 1% and 2% ratios. The graphs will look completely different even though the wheel is identical.
Volatility across strategies
Flat betting on red gives the smoothest graph - small wiggles either side of the baseline.
Single number bets give the spikiest graph - long flat losing periods punctuated by sudden 35:1 jumps.
Labouchere and Oscar's Grind grind upward slowly until a losing streak forces a steep recovery climb.
Martingale looks like a flat ceiling with an occasional cliff. The cliff is the part most demonstrations leave out.
Reading the graph honestly
A graph that ends above the starting line does not prove the strategy works. Run the same setup five more times. Half of them will end below. The honest read is the average behaviour and the worst case - peak, drawdown and bust frequency across many runs, not the shape of one session.