The Core Idea

Roulette splits the 36 numbers into three "Dozens": D1 (1-12), D2 (13-24), D3 (25-36) — plus 0, which belongs to none of them.

This tool watches the last 3 spins for a full rotation through all three Dozens, in order: D1 → D2 → D3, D2 → D3 → D1, or D3 → D1 → D2. Some players believe a completed rotation like that is less likely to immediately repeat itself. This simulator lets you test that theory over many spins — it does not change the actual odds of the wheel.

How a Bet Gets Armed

Minimum Sequence Repeats sets how many times in a row the same rotation has to occur before a bet is armed. At 1, a bet arms the moment a single rotation completes. At a higher number, the same rotation pattern has to repeat back-to-back that many times first.

Once armed, the bet is placed on the next spin — never the spin that triggered it. The tool bets on the two Dozens that would not continue the pattern.

Bet Sizing (Progression)

Loss Progression is a comma-separated list of bet sizes (e.g. 1,3,6,8). Step 1 is the starting bet. Every loss moves to the next step; every win resets back to step 1.

Flat Bet ignores the progression and always uses the first number.

Pause After Max Progression: if checked, betting pauses after losing at the final step. Unchecked = loop back to step 1.

Ignore Zero: when checked, zero while a bet is armed carries the bet forward (no loss).

Controls & Panels

SPIN • AUTO • QUICK SPIN 100 — found in the bar fixed to the bottom of the screen. RESET is under the Progression field in Settings — press it any time you change Starting Bankroll, Min Sequence Repeats, or Progression Steps for the new values to take effect.

Current Trigger shows the armed rotation. Current Bets shows which Dozens you're backing. The charts track bankroll and progression usage. Sequence Counts shows how often each rotation has appeared.