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Some players believe the key to winning is betting a progression.
A progression is simply doubling your bets when you lose to try and recoup your losses. This is a losing strategy. Casinos know this system and take a simple precaution. If you hit a losing streak while betting a progression, and bump against the maximum, you will not be able to automatically recoup your losses by doubling your bet again if your doubled bet would be larger than the maximum bet accepted. This makes progression betting a long run loser.