Always keep in mind that casinos are more clever than you. With that being said, casinos hire former card counters to be able to spot new card counters. So when you count cards, the casino counts cards as well. And since card counters are betting in a certain way, they can spot you from that. If you bet high when the count is high and the minimum when the count is low, as you suppose to, believe us, it's very easy to get busted!