The Hi-Lo card counting system
Hi-Lo is the most popular card counting system and the best place to start. It is a balanced, single-level count: low cards are +1, high cards are −1, and the middle cards are neutral. Because it is balanced, a full deck counted from start to finish returns to exactly zero — which is what lets you convert the running count into a true count and bet accordingly.
Hi-Lo tag values
Every rank's count value in Hi-Lo, straight from the trainer's engine:
| A | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | J | Q | K |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| -1 | +1 | +1 | +1 | +1 | +1 | 0 | 0 | 0 | -1 | -1 | -1 | -1 |
Because it's balanced, a full deck counts to zero — divide the running count by the decks remaining to get the true count you bet and deviate on.
Running count → true count
Hi-Lo's running count is the sum of the tags you've seen, but it doesn't account for how many cards are left to come. Divide it by the decks remaining to get the true count — a +6 running count with three decks left is a true count of +2. The true count is what you bet and deviate on, so estimating decks remaining from the discard tray (in half-deck steps) is a core Hi-Lo skill — the trainer shows the decks remaining at each checkpoint so you can drill the conversion itself.
Why Hi-Lo is the standard
Hi-Lo hits the sweet spot of power and simplicity: its betting correlation is high enough to capture nearly all the available edge, yet the +1 / 0 / −1 tags are easy to run at full table speed. It's also the count the famous Illustrious 18 and Fab 4 index plays are built around, and the system most teams and books teach first. Master Hi-Lo and everything else — deviations, side counts, multi-level counts — becomes an incremental step rather than a fresh start.
Strengths
- Easiest system to learn and to run at full table speed
- Excellent betting correlation — it tells you when to raise your bet
- Balanced, so a complete deck sums to zero (a built-in error check)
- The foundation for the Illustrious 18 and Fab 4 index plays
What to watch out for
Hi-Lo is balanced, so you must divide the running count by the decks remaining to get the true count before sizing bets or making deviations.
Who it's best for
Hi-Lo is best for beginners and the vast majority of players. Whatever system you choose, the edge only shows up on top of perfect basic strategy, so drill your decisions alongside the count.
Practice Hi-Lo free
The counting trainer streams a live shoe and grades your running and true count at timed checkpoints. Hi-Lo and KO are available from the start; Hi-Opt I and Omega II unlock as you level up.
Other counting systems
- KO (Knock-Out) — players who want strong results with the least table-side math.
- Hi-Opt I — players who already run Hi-Lo and want more playing accuracy.
- Omega II — advanced counters who want maximum power.