What Is Open Interest? Crypto Open Interest Explained

Open interest refers to the total number of outstanding derivative contracts in a market, futures and options that remain open because they have not been closed, settled or delivered. Every open contract has two sides: one long position and one short position together make exactly one contract. When open interest (OI) rises, new money is entering the market. When it falls, traders exit positions or get liquidated. On Binance's BTCUSDT perpetual, open interest stood at 98,389 bitcoin, or $6.72 billion, on November 14, 2026.

Open interest says nothing about the direction of the market or about market sentiment, but a lot about how loaded it is: how much leveraged capital sits in active positions. If you are new to the contracts behind it, start with our guide to crypto futures and perpetual futures. The current reading for bitcoin is on our live open interest chart.

Bitcoin open interest: the key numbers

• On November 15, 2026, 98,138 bitcoin were open on Binance's BTCUSDT perpetual, about $6.29 billion at a mark price of $64,109.
• From October 16 to November 14, 2026, open interest in dollars fell from $7.76 billion to $6.72 billion, a drop of 13%.
• Measured in bitcoin, it rose 4% over the same period, from 94,395 to 98,389 BTC.
• The highest daily value in dollars was $8.24 billion on October 22, 2026.
• The long/short account ratio climbed from 1.50 on October 16 to 3.23 on November 14, 2026, with 76.4% of accounts long.
• Longs paid shorts at 89 of 90 funding intervals.

What is open interest? One long and one short make one contract

A futures contract is an agreement between two parties. The buyer goes long and profits if the price rises. The seller goes short and profits if the price falls. A contract only exists once both sides meet. That is why the number of open long positions on an exchange always equals the number of open short positions, counted in contracts or in bitcoin. Open interest counts each of these pairs once.

One point is easy to miss: open interest measures size, not sentiment. Rising open interest shows that more capital and more market participants are committed, not whether buyers or sellers will be proven right. To read direction, combine the open interest data with price, the long/short ratio and funding rates.

Open interest is calculated by adding every new contract and subtracting every contract that is closed. It is quoted as the number of contracts, in units of the underlying asset or as notional value in dollars, which is quantity times price. The notional value moves even when only the price changes. The same principle applies in options trading and in the futures market of CME Group: every open call option has a buyer and a seller, and the exchange reports the total number of open options contracts at the end of each trading day.

Open interest vs. trading volume

Trading volume counts how many contracts are traded during a period and resets to zero every day. Open interest counts how many open contracts remain afterwards. A simple example with three traders shows the difference:

In step 2 only the owner changes. In step 3 the contract disappears. Volume shows trading activity, open interest shows the market participation that stays in the market.

When open interest increases and when it decreases on bitcoin perpetuals

On bitcoin perpetual futures, the contracts without an expiry date, three things change open interest. Every trade falls into exactly one of them.

• New positions: a buyer opens a new position on the long side and a seller opens the matching short. Open interest increases by the traded amount.
• Transfer: a trader closes an existing position by selling it to someone who is opening a new one. Only the owner changes, open interest stays the same.
• Closing: both sides exit, the long sells and the short buys back. Open interest decreases.

Liquidation is a special case of closing. When the margin behind a position is no longer enough, the exchange closes it with a market order. A long liquidation is a forced sale, a short liquidation a forced purchase. If no other trader takes over the position, the contract disappears and open interest decreases sharply. To see how close your own position is to that point, use our guide on how to calculate your liquidation price.

Perpetuals also carry a funding rate. When the perpetual trades above the spot price, longs pay shorts every eight hours on Binance. Our guide to the funding rate shows what that costs a position over time.

Bitcoin open interest: 30 days of Binance data

Binance Futures trading data for the BTCUSDT perpetual, the Tether-settled bitcoin contract without expiry, show a move that looks contradictory at first. Measured in dollars, open interest fell 13% from October 16 to November 14, 2026, from $7.76 billion to $6.72 billion. Measured in bitcoin, it rose 4%, from 94,395 to 98,389 BTC.

Both are true, because notional value depends on price. Dividing open interest in dollars by open interest in bitcoin gives the price Binance uses: it fell from $82,199 to $68,272 over those 30 days, a decline of 16.9%. Traders did not cut their positions. They even added bitcoin, which is simply worth less in dollars. Look only at the dollar line and you see a retreat that never happened. Over weeks, compare open interest in bitcoin. The dollar figure is the right tool for comparing markets such as Binance, Bybit and the CME.

Open interest analysis: reading price and open interest together

Combined with price, open interest gives four common readings. They describe what is happening in the market and are not a forecast:

The last 30 days on Binance fit the third row: price fell while open interest in bitcoin rose slightly, so the current trend lost no participants. The table alone cannot tell you which side opened the new positions. For that you need a second metric, the long/short ratio.

High open interest and a one-sided long/short ratio: why that signals squeeze risk

A squeeze happens when many leveraged positions sit on the same side and price moves against them. The first liquidations are market orders in the direction of the move and push price toward the next liquidation levels. When longs get caught in that chain, it is a long squeeze; when shorts do, a short squeeze. High open interest typically means more positions that can be pulled into such a cascade.

The long/short ratio shows whether the load is one-sided. On Binance's BTCUSDT perpetual it rose from 1.50 on October 16 to 2.57 on November 3 and 3.23 on November 14, 2026. By then 76.4% of accounts were long. On October 22, the day of peak open interest at $8.24 billion, the ratio was still 1.02. Our long/short ratio chart tracks the current value.

One detail matters for the reading: the ratio counts accounts, not volume. Since every contract has a long and a short, the many accounts on the long side face fewer but larger accounts on the short side. The data describe many small longs against a few large shorts, with price down about 17% since mid-October. The funding rate fits: longs paid at 89 of 90 intervals, 0.0070% per interval on average. A setup like this shows where a liquidation cascade would find the most fuel. None of these numbers says whether or when it starts.

Worked example in euros: one position and its open interest

This example with a €1,000 stake shows what a single position adds to open interest and how quickly leverage brings it to liquidation. It uses the mark price of $64,109 on November 15, 2026, converted at the ECB reference rate of $1.1052 per euro, so about €58,007 per bitcoin. It assumes isolated margin and a maintenance margin of 0.5%, excluding fees and funding.

If you open the 10x long and the other side opens a new short, open interest rises by 0.1724 BTC, about $11,052. If price then falls 9.5%, the exchange liquidates your position and the same amount leaves open interest again, unless another trader takes it over. In a long squeeze, the data show this thousands of times at once. Our guide to leverage trading in crypto explains how leverage, margin and liquidation price fit together.

Where to find open interest data and how traders use it

Open interest is an indicator of market structure, not of the next price movement. High open interest generally comes with higher liquidity. A sudden drop during a large candle points to liquidations, a quick rise during a sideways phase to new leverage. For trading decisions, read it alongside price, the long/short ratio and the funding rate, not on its own.

Every exchange reports its own open interest: Binance, Bybit and OKX for their perpetuals, the CME for its regulated bitcoin futures, and decentralized exchanges such as Hyperliquid on the blockchain. Our comparison of the best perp DEXs gives an overview of those platforms. If you want to trade with a licensed provider, our comparison of regulated crypto exchanges lists exchanges with a license.

Leveraged derivatives are risky, and even small price moves can cost your entire stake. This article explains a metric and is not investment advice.

Open interest near 98,000 BTC: traders held their bets as price fell

In mid-November 2026, open interest on Binance's BTCUSDT perpetual painted a clear picture: fewer dollars but more bitcoin in open positions than four weeks earlier, and three out of four accounts on the long side. Read open interest together with price and the long/short ratio, and you see earlier where positions are piling up.