Using a hi-low system, you assign a positive number (+1) to any card between 2 and 6, a neutral number (0) to any card between 7 and 9, and a negative number (-1) to develop a running count. The blackjack tricks’s name says it all: you count cards. Counting cards can give you the upper hand at the blackjack table, but you have to put the work in.Ĭontrary to what many of us believe, you don’t have to be a mathematical genius to count cards.