The Fibonnaci System in roulette is based on a sequence of numbers in which a number in the progression is calculating by adding the previous 2.
An example would be:
Start at the beginning of the sequence. If you win, rebet (flat betting). If you lose, move up the sequence until you win, and then drop down to the starter bet. For a full list of roulette casinos that accept Fibonacci bets, try onlineroulette.org.uk which features bonus offers, video tutorials (including Fibonacci) and tips.
Ladbrokes- play Premier Roulette Here
Spin Palace- with £1000 bonus
8 variants of roulette.
Play the Fibonnaci at Mansion