Out of all the types of advantage play I have discussed on this website Roulette Bias is by far the easiest to understand. There may be some people out there that try to over complicate it, but it really is as simple as it gets.
The Roulette wheel is broken up into 18 black slots, 18 red slots, a green zero, and on an American wheel a green double zero. I will use the American wheel for this discussion. This gives us a total of 38 outcomes. You can bet any individual number on the wheel and the payout is 35:1. Immediately you can see the house advantage. Over the long haul you would expect any specific number to appear 1 out of every 38 spins. A fair return would be 38:1.
On a perfectly balanced wheel the outcome would be 1 out of every 38 spins. The problem is that these wheels are mechanical and are not perfectly balanced. They can have worn bearings, imperfections in certain slots, and any number of other defects that are not obvious, yet can affect certain areas of the wheel. This is called “bias”. The idea is that every wheel has certain numbers that show up more than they should, statistically speaking. If you can figure out what these numbers are you simply bet those numbers and over the long haul you start winning money.Detecting these numbers is really quite simple. Make no mistake though, there is a big difference between simple and easy. All you need to do to find these numbers is to track several thousand spins of a specific wheel. 3,800 will give you a good idea, but 38,000 will give you an accurate picture. Gaining that kind of data on a specific wheel without drawing attention to what you are doing is a considerable challenge. Once you have the data you simply analyze it to see which numbers are coming up more often than they should. You will most likely find a cluster of numbers in on area of the wheel. After you have this information it is simply a matter of betting those numbers repeatedly and making sure that they do not switch the wheel out on you.