The Hi-Lo card counting style is one of the most well known of them all. Other names for this style are also known as High-Low or Plus-Minus card counting. The Hi-Lo system was first invented by the mathematician Harvey Dubner and later improved by Professor Edward Throp, who was one of the founding fathers of card counting strategy. The Hi-Lo strategy is very easy to use by both novices and more advanced players. The high-low card counting method is the most commonly used type because of how easy it is to use and is most especially used by blackjack teams.

大概Hi-Lo算牌法是所有算牌法中名气最大的了，它也被称为High-Low算牌法或+/-算牌法。这种算牌法最初是由数学家Harvey Dubner发明的，后来由Edward Throp教授（其被称为是算牌法之父）改进。无论是新手还是熟练的玩家，都可以很容易地使用这种算牌法，这也是黑杰克团队玩家的常用算牌法之一。

The first thing all blackjack players must do is learn and memorize the blackjack basic strategy and then complement this to the Hi-Lo method. You need to do this in order to maximize your edge as much as possible and this requires a nearly perfect game. The High-Low strategy starts by keeping track of every card that is seen on the table. This means watching what cards the dealer throws down and the cards that the other players have down as well. Each card is assigned a “count” value or point. A list of point values for each card is shown in the table below:

首先，你要学会并记住黑杰克的基本策略卡，然后结合入这个Hi-Lo算牌法，以最大可能地提升你的胜率。你要盯住桌面上出现的每一张牌（包括庄家以及其他玩家的），每一张牌都有一个点数，你要在心里快速地进行相应的加减运算。下表就是Hi-Lo算牌法的计数值表。

The high-low card counting system is a balanced system. This means that when you start your count off at 0, you should end your count at 0 as well when every card has been seen and the deck needs to be shuffled again. This is because the lower five cards have +1 values and the upper five cards have -1 values so they cancel each other out. The best way to master this system is to keep practicing outside of the casino. You can learn to increase your counting speed by having yourself or someone quickly deal a deck of cards and you try to keep up with the count. Because this is a balanced card counting system, you should end up with a count of 0 at the end. If the count is not zero, then you know you have miscounted!

Hi-Lo算牌法是“平衡”算法（由零开始，到零结束）。你可以自己或者让朋友来快速地发牌，然后你开始计算相应的计数值，如果所有牌都发完后，你的计数值应该为零；否则就说明你计算错了。

An example of an unbalanced system is the KO or knockout method of card counting where the ending total is not zero. Now for the Hi-Lo blackjack system, you are trying to wait for a high positive number before betting big. This means many small cards have been used up and your edge increases when more big cards are left in the game. Also, card counting also tells you when not to bet. When there is a large negative count, then there are a bunch of small cards left in the deck and it’s best to conserve your bet and wait for this bad swing to pass.

还有另一类的算牌法，是“非平衡”的，比如KO算牌法，结束的时候就不是零。对于Hi-Lo算牌法来说，当你的计数值足够大时，就可以相应的提高你的下注额。因为足够大的计数值说明有许多小点数的牌已经出现了，剩余了大量的花牌，这就相应地减少了庄家优势，提升了你的胜率。相反的，当计数值是负数，且足够小的时候，你就应该停止下注了，知道计数值又回到正数。

We all know the casino always has the edge in blackjack, so if you complement the hi-lo card counting system to the basic strategy, you will get the maximum edge and actually eliminate the house edge and even give yourself an edge. Casinos make their profit due to this edge, meaning if you were to gain an edge, it is guaranteed to make you money in the long run. This is how these great card counters broke the bank.

我们知道，黑杰克游戏是有庄家优势的。但如果将Hi-Lo算牌法和基本策略卡结合起来用，这会提升你的胜率，减少庄家优势，甚至使得你的胜率超过庄家的。娱乐场就是靠这些庄家优势获利的，也就是说，只要你的胜率超过庄家的，那么你就可以反过来获利（从概率来说的确如此）。所有的算牌法都是基于这一点的。