What Is the Hi-Lo Card Counting System?
The Hi-Lo card counting system is one of the most popular and widely recognized strategies in blackjack. Its popularity stems from its relative simplicity, making it an excellent starting point for players new to card counting. If you've ever seen a movie featuring blackjack, chances are you've seen a dramatized version of the Hi-Lo system in action.
Invented by Harvey Dubner in 1963, the Hi-Lo system was a simplification of Edward O. Thorp's more complex Ten Count system, detailed in his groundbreaking book Beat the Dealer. Dubner's streamlined approach made card counting accessible to a much wider audience, and it remains one of the most balanced and effective methods used today.
How the Hi-Lo System Works: A 4-Step Guide
Mastering the Hi-Lo card counting system requires practice, but its core mechanics are easy to understand. It’s a balanced counting method that follows a consistent pattern. Here’s a step-by-step breakdown of how to use it at the blackjack table.
Step 1: Assign Values to the Cards
The first step is to memorize the value assigned to each card. The Hi-Lo system divides the deck into three simple groups:
- High Cards (10, J, Q, K, A): These have a value of -1.
- Neutral Cards (7, 8, 9): These have a value of 0.
- Low Cards (2, 3, 4, 5, 6): These have a value of +1.
Notice that the Ace is counted as a high card (-1). When the count is high and positive, it means more low cards have been dealt, leaving the deck rich in high cards (tens and Aces), which favors the player.
Step 2: Keep a Running Count
Your count starts at zero with a fresh shoe. As each card is dealt, you mentally update your tally based on the values from Step 1. This ongoing tally is called the running count.
For example, you're in a game and the first cards dealt are a 5 (+1), a Jack (-1), a 9 (0), an Ace (-1), and a 3 (+1). Your running count would be: +1 - 1 + 0 - 1 + 1 = 0.
Step 3: Calculate the True Count
The running count is useful, but it doesn't tell the whole story, especially in games with multiple decks. To get a more accurate measure of your advantage, you need to calculate the true count.
The true count is the running count divided by the number of decks remaining in the shoe.
Estimating the remaining decks takes practice. Let's say your running count is +9, and you estimate there are about 3 decks left. Your true count would be 9 / 3 = +3. This number gives you a standardized value to base your betting decisions on.
Step 4: Adjust Your Bets
The final step is to use the true count to inform your betting strategy. A positive true count indicates the player has the advantage, so you should increase your bet. A negative true count means the house has the edge, so you should bet the table minimum.
A general guideline for betting is:
- True Count +1 or lower: Bet the minimum.
- True Count +2: Bet 2x your minimum bet.
- True Count +3: Bet 3x your minimum bet.
- True Count +4 or higher: Bet 4x your minimum bet.
This systematic approach to betting is how card counters capitalize on favorable situations to overcome the house edge.
Can Casinos Catch You Using the Hi-Lo System?
While card counting is not illegal, casinos are private establishments and reserve the right to refuse service to anyone. Since the Hi-Lo card counting system is so well-known, dealers and pit bosses are trained to spot its telltale signs, such as drastic changes in bet size that perfectly correlate with the count.
To avoid detection, blend in with other players. Vary your bets, engage in conversation, and avoid staring intently at the cards. Making an occasional play that goes against perfect strategy can also help throw off suspicion. The key is to look like a regular gambler, not a professional advantage player.
Alternatives to the Hi-Lo Counting System
While Hi-Lo is an excellent all-around system, other methods exist. If you find it isn't the right fit, consider these alternatives:
- The Ace/Five System: The simplest method. You only count Aces (-1) and 5s (+1). It's less powerful but much easier to track.
- The K-O (Knockout) System: Similar to Hi-Lo but is an 'unbalanced' system that doesn't require conversion to a true count, making it easier for beginners. The 7 card is counted as +1.
- Thorp’s Ten Count: The original system that started it all. It is more complex and was designed for single-deck games, making it less practical today but still a foundational strategy.
Is the Hi-Low Card Counting System Right For You?
If you're looking for a proven and accessible entry into card counting, the Hi-Lo system is an excellent choice. It offers a fantastic balance of simplicity and effectiveness, providing a real mathematical edge when used correctly.
Success requires dedication and practice. Start by practicing at home with a deck of cards until you can keep count effortlessly. Once you're confident, you can try it at a casino. Remember to always gamble responsibly and understand the risks involved.
