Every system in our catalog started as an idea someone had at a table or in a video. The System Builder lets you do the same: put your own idea on a virtual table, run it through the exact same simulation we use for the catalog, and find out how it behaves — before a single real chip is at risk. Here is how to do it, step by step.
1. Put your bets on the table
Open the System Builder (you need a free account). Pick a chip value at the top and click the table to place bets: straight-ups, splits, streets, corners, double streets, dozens, columns or even-money bets — anything you can bet at a real wheel. Click a bet again to add another chip; right-click to remove it.
The Stats tab updates as you go: how many numbers you cover, what one spin costs, and the best and worst possible result. Choose European or American wheel at the top — it matters more than most people think. When the table looks right, press Save level →. That's Level 1.
2. Build the progression
Most systems change the bet after a loss. To add Level 2, change the table — press ×2 Double to double everything, or add and remove chips by hand — and press Save level → again. Repeat for as many levels as your system has. The Levels tab lists them all, with the stake per spin and the total exposure if every level loses.
3. Set the rules
A progression is only half a system. The other half is the rules: where do you go after a win, a loss, or a spin that breaks even? On the Levels tab you can pick a ready-made rule for all levels, or click a level's rule line to set it by hand:
On win — back to Level 1, stay, step down one or two levels, or only reset when you reach a new session high. You can also require two or three wins in a row.
On loss — up one level, stay, back to Level 1, or jump to a specific level.
Partial loss — for systems with several bets, a spin where some bets win but you still lose part of the stake can have its own rule (Star 32 stays on the same level, for example).
On push — what to do when a spin nets exactly $0.
Some systems don't use fixed levels at all. Under Betting mode you can switch to goal-based sizing — Progressive Recovery, Oscar's Grind, Labouchère or Bold Play — where the bet follows how far you are from your goal. The box under the rules always explains, in plain English, what your system will do. Read it: if it doesn't match what you meant, the simulation won't either.
4. Simulate
On the Simulate tab, enter your bankroll and press Run simulation. The builder plays your system with 10,000 independent players, each starting with that bankroll, and stops each one when they either reach the goal or can no longer cover the next bet. You get the result for three goals — +$50, +$100 and +$200:
Win rate — how many players reached the goal.
Bust risk — how many ran out of money first.
Avg spins — how long a session typically lasts.
Read the bust risk as carefully as the win rate. A player who busts loses the whole bankroll, while a winner takes home only the goal — so a 90% win rate can still lose money on average. On the system pages in our catalog you also see Avg net, the average result over all players. It is always negative: the house edge sees to that, and the more money a system puts on the table, the more negative it gets.
5. Compare against the benchmark
A win rate on its own doesn't tell you much. 85% sounds great until you know that Bold Play — simply betting what you need on red or black — reaches the same goal with the same bankroll about 90% of the time. Every system page in our catalog shows that benchmark next to its results, so you can see how close a system gets. Use the same yardstick for your own: if your system lands far below it, it is mostly paying the house edge in exchange for longer sessions.
6. Play it
Numbers are one thing; living through a losing run is another. The Play tab lets you spin your system one spin at a time with play money and see exactly what the rules make you bet next. Watch what happens when you reach the higher levels — that feeling is the real cost of the system.
7. Save, share — or send it to us
Press Save to keep your system. From My Systems you can reopen it later, share a link so friends can see and play it, or submit it to the catalog. Every system we accept goes through the same tests as the rest of the catalog and gets its own page. A free account saves one system; Pro saves as many as you like.
A few tips before you start
Start simple. Build the base bet and two or three levels first, simulate, then add complexity. It is much easier to see what each change does.
Change one thing at a time. Move one bet, change one rule, simulate again. Systems with many moving parts are easy to fool yourself with.
Don't chase the win rate. Almost any system can reach 95% at +$50 if the bankroll is big enough. Look at bust risk and avg net — they tell you what the 5% costs.
Remember what the simulation can't change. No arrangement of chips beats the house edge. The builder can show you how a system behaves, how often it fails and how much a failure costs — it can't turn a negative game into a positive one. That is exactly why it's worth knowing before you play.