How to read open interest in crypto: a guide for non-traders

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October 3, 2026 • 8 min read

# How to Read Open Interest in Crypto: A Guide for Non-Traders

Imagine You Are at the Market

You go to a vegetable market. You see more and more people crowding around one tomato stall. Some are buying, others are selling, arguing over the price, making deals. You don't know yet whether tomatoes will go up or down in price, but one thing is already clear to you: everyone is interested in tomatoes today.

This is roughly how open interest works in the cryptocurrency world. Only instead of tomatoes, it's Bitcoin or Ether, and instead of a stall, it's an exchange.

What is "Open Interest" in Simple Terms

In crypto, people don't just buy and sell coins. Many enter into bets on the future price — so-called futures contracts. It's like a wager: one says "the price will go up," the other says "the price will go down." Both put real money into this bet.

Open Interest (OI) is the total amount of money that is "frozen" right now in such bets. These are all the wagers that have not yet been closed or settled. The money is on the table, the game is on.

A simple analogy: imagine a casino. Open interest is not how many people entered the casino during the day (that is trading volume). It's how many chips are sitting on the tables right now in unfinished games.

What Open Interest is NOT (Important!)

Many people confuse OI with trading volume. These are different things:

| | Trading Volume | Open Interest |
|---|---|---|
| What it counts | All trades over the day | Only "live," open trades |
| Analogy | How many times the casino doors opened and closed | How many chips are on the tables right now |
| Can rise and fall | Yes, differently every day | Yes, but more slowly and "honestly" |

Trading volume can be huge even if everyone quickly opens and closes trades within a minute. But open interest shows whether real money remained "in the game" after that.

The Main Rule: Never Read OI on Its Own

Open interest by itself is like body temperature. Is 38°C a lot or a little? It depends on whether you have a sore throat, a cough, what time of year it is. OI is always looked at alongside the price.

It is precisely the combination of "what the price is doing + what OI is doing" that provides useful information.

Four Main Scenarios (And What They Mean)

🟢 Scenario 1: Price Rises + OI Rises

What is happening: new money is coming into the market, new people are opening bets, and at the same time the price is going up.

What it means: the trend is strong and genuine. The price increase is backed by real interest. It is like the crowd at the tomato stall growing, and people being willing to pay more and more. The growth is likely to continue.

Simple takeaway: "The growth is healthy, you can trust it."

🟡 Scenario 2: Price is rising + OI is falling

What is happening: the price is creeping up, but there is less money in the bets. People are closing their positions and leaving.

What it means: the growth is weak and likely temporary. The price is being pushed up not by new money, but by those closing their old unprofitable positions (this is called a "short squeeze", but you do not need to memorize the term). Imagine tomatoes getting more expensive, but there are fewer and fewer buyers at the stall. Soon there will be no one left to buy.

Simple takeaway: "Growth on its last legs. A reversal may happen soon."

🔴 Scenario 3: Price is falling + OI is rising

What is happening: the price is plunging, but the amount of money in the bets is increasing. New people are actively entering the game, betting on a decline.

What it means: the drop is strong and confident. New players are entering the market believing the price will fall further, and investing real money in it. It is as if everyone in the market started shouting "the tomatoes are rotten!" and betting money on it. The downward pressure is serious.

Simple takeaway: "The drop is real and may continue."

🟠 Scenario 4: Price is falling + OI is falling

What is happening: the price is declining, and money is leaving the bets. People are closing positions and leaving the market.

What it means: the drop is running out of steam. Those who bet on growth have already given up and left. There are no new players. Often this is a signal that the worst is behind us and the price may stop falling soon. Imagine: tomatoes are getting cheaper, but the sellers are also going home because there is no one left to trade with.

Simple takeaway: "The panic is ending. The bottom might be near."

Summary Cheat Sheet

| Price | OI | What it means | Trend Strength |
|---|---|---|---|
| ⬆ Rising | ⬆ Rising | Strong growth, new money coming in | 💪 Strong |
| ⬆ Rising | ⬇ Falling | Weak growth, money leaving | 😟 Weak |
| ⬇ Falling | ⬆ Rising | Strong drop, new bears | 💪 Strong |
| ⬇ Falling | ⬇ Falling | Drop running out of steam, panic fading | 😌 Fading |

Extreme OI Values: When to Be Cautious

There is one more important point. When open interest reaches record high levels, it is often an alarm signal.

Why? Because too many people put money into bets at the same time. Imagine a packed stadium where everyone stands on their tip-toes to get a better view. Sooner or later, someone trips — and a stampede begins.

In practice, this looks like:

OI hits all-time highs → the market is overheated
This is usually followed by a sharp and fast price movement (in either direction) that "shakes out" excess players
This is called liquidation — when the exchange forcibly closes losing bets

Simple takeaway: "If OI goes off the charts, expect a storm. It doesn't matter which direction."

Where to check Open Interest?

You don't need to be a programmer. There are free websites with user-friendly charts:

Coinglass.com — the most popular one, shows OI across all exchanges
CoinMarketCap — in the derivatives section
TradingView — if you already use charts, OI can be added as an indicator

Usually, it is enough to go to Coinglass, select the desired coin (e.g., Bitcoin), and look at the "Open Interest" chart.

Common beginner mistakes

❌ Mistake 1: "OI is growing — that means I need to buy!"
No. OI also grows when the price drops. Always look at the combination of "price + OI".

❌ Mistake 2: "OI will accurately predict the future"
No. This is one of the tools, not a crystal ball. OI shows market sentiment, not a guarantee.

❌ Mistake 3: Looking at OI on a single exchange
Data can vary. It is better to look at the aggregate OI across all major exchanges (Coinglass does this automatically).

❌ Mistake 4: Panicking over short-term spikes
OI can twitch by 5% in an hour — this is noise. Pay attention to the trend over days and weeks.

Summary: what to remember

Open Interest is the amount of money "frozen" in open price bets.
OI by itself is useless — it is always viewed together with the price.
OI growth = new money is coming in = the trend is strengthening (in either direction).
OI drop = money is leaving = the trend is weakening.
Record OI = overheating = expect a sharp move.
This is one of the tools, not a magic button. Use it alongside other data.

Main thought: Open interest is like the market's pulse. You cannot diagnose a condition from it alone, but you can tell whether the patient is alive, calm, or running a fever. And that is already quite a lot for anyone who wants to understand what is happening with their cryptocurrency.