Blackjack Hi Lo count system, which is also called Plus/Minus is thought to be one level count (the count adds or subtracts one). The author of the system is Harvey Dubner who made Ed Thorp’s Ten-count system much simpler.
 Hi-Lo system is a perfect start for those who have just started learning blackjack and want to find the way to increase their odds. This method can be used in teams and can be used for any game of blackjack.
 The basics of this count are so simple that if you know the basics of arithmetic’s you will learn how to use it. In order to use this strategy you are to memorize the numbers that correspond to group of cards in the game.
 The card values in this system are as follows : 
Cards 2 3 4 5 6 7 8 9 10 J Q K A
Values +1 +1 +1 +1 +1 0 0 0 -1 -1 -1 -1 -1
 This system is a balanced one as if you count the whole deck you will end having a zero. As soon as the game starts the count is 0, then you add or subtract 1 from it. When you do that you know the percentage of high cards in the deck.
 The higher the count is the more small cards have been dealt already, therefore, big cards are about to come. Therefore you can get a good starting hand and blackjacks and the dealer is more likely to bust.
 When the count is too small or negative this means that lots of big cards were dealt already and small cards are in the deck. This situation favors the dealer as he is less likely to bust if he has 15 or 16 and hits.
 If you lost the count while you were playing you can go on using the Basic Strategy and avoid too risky bets.