Strategy concept (short)
After a 0 appears, the simulator places three double-street (six-line) bets on specific blocks: 1–6 (low), 16–21 (middle) and 31–36 (high). The idea: when the wheel hits zero it often precedes a bounce into either the low block or the high block — the extremes — while the middle block acts as a safety buffer.
Why these three lines?
• Low (1–6) — sometimes the wheel “returns” to low numbers right after zero; a hit here pays 5:1 on that six-line.
• Middle (16–21) — this is the safety bet. It reduces variance because it sits between the extremes and increases the chance one of the three lines lands.
• High (31–36) — the opposite extreme; when the wheel goes “high” after a zero this line captures that outcome.
How the progression works
You provide a progression (e.g. 1,3,6,9). Each progression step is the number of units staked per line.
On each betting spin the tool places stake = progressionStep × unit on each of the three double-streets.
• If one of the three lines hits, the sequence stops and waits for the next zero.
• If all miss, the sequence advances to the next progression step and retries on the next spin (until you win or reach the end of the progression — which you can set to stick/loop/stop).
Expected behaviour & bankroll
A single betting spin covers 18 numbers (3 × 6), so the hit probability while betting is 18/37 ≈ 48.65%.
A hit on one six-line returns 5:1 (displayed as the simulator’s payout logic). The overall expected value per unit is negative (house edge) — this is a monitoring / analysis tool, not a guaranteed profit system.
How the tool simulates that
• The simulator generates uniform random spins (0–36).
• When a 0 occurs it arms the next spin to start the progression (or you can step through manually).
• The UI shows a live Chart.js bankroll graph, a recent spins feed, and you can:
– set your unit size and progression
– fullscreen the chart
– autoscroll through each zero in the history to inspect outcomes.
Practical notes
• The middle bet (16–21) is there to lower the probability of long losing runs, it’s not a guarantee — it smooths variance.
• Always simulate with realistic bankrolls and max stakes. The tool records wins, losses and drawdowns so you can experiment safely.