How does online roulette work?

Which roulette wheel has the lowest house edge?

The single-zero wheel does. Each extra zero adds a pocket that the payouts ignore.

Figures from Wizard of Odds. Check the wheel in the game rules, since the table looks similar.

What does each roulette bet pay?

On a double-zero wheel, every bet has the same 5.26% edge except one. Higher payouts come with lower chances of winning, and the long-run cost stays the same.

Which roulette bet should you avoid?

Avoid the first-five bet on a double-zero wheel, which covers 0, 00, 1, 2 and 3. It pays 6 to 1 and carries a house edge of 7.89%, against 5.26% for every other bet on that wheel.

What are la partage and en prison?

Both reduce your loss on even-money bets when the ball lands on zero. With la partage, you get half your bet back. With en prison, your bet stays for the next spin. Wizard of Odds puts the cost at about 1.35% under French half-back rules. Atlantic City's half-loss rule lowers even-money bets on a double-zero wheel to 2.63%. Few games offer these rules, so check first.

Do roulette betting systems work?

No. A system such as doubling after a loss changes the size of your bets, not the house edge on each one. Each spin is independent, so a run of red does not make black due. You can have short winning runs, but a long enough run costs you the edge on everything you bet. See responsible gambling if you are chasing losses.