Reading crypto market data: order books, funding rates, open interest and liquidations
By the Ozelinx editorial team · Published · Updated · 8 min read
Key takeaways
- Order book depth shows resting liquidity; imbalance can hint at short-term pressure but is easily spoofed.
- Funding rate and open interest show how crowded leveraged positioning is.
- Long/short ratios and liquidation feeds reveal where forced selling or buying may occur.
- No single metric predicts price; combine them with risk management.
Our markets pages show the same kinds of public data that exchanges display: order books, recent trades, funding rates, open interest and liquidations. These numbers are useful context, but each is easy to over-interpret. This guide explains what they measure and what they do not.
The order book
An order book lists resting limit orders: bids (offers to buy) below the current price and asks (offers to sell) above it. The gap between the best bid and best ask is the spread. The depth chart plots the cumulative size of orders as you move away from the price, showing how much would need to trade to move the price by a given amount.
Things to keep in mind:
- It is one venue’s book. Crypto trades on many exchanges at once. A thin book on one venue does not mean the whole market is thin.
- Orders can vanish. Large resting orders can be cancelled in milliseconds. A “wall” of bids is a statement of intent, not a promise.
- Depth matters more than the top level. For practical purposes, ask how much size sits within 0.5% or 1% of the price.
Recent trades and taker volume
The trades feed shows executed trades, coloured by which side initiated them. A taker buy is someone paying the ask; a taker sell is someone hitting the bid. Comparing taker buy and sell volume over an hour gives a rough sense of who is in a hurry. It does not tell you who is right.
Funding rates
Perpetual futures have no expiry, so exchanges use a funding rate to keep their price close to spot. Every funding interval (commonly eight hours, sometimes shorter), one side pays the other. When the perpetual trades above the index price, the rate is usually positive and longs pay shorts; when it trades below, shorts pay longs.
- A persistently high positive rate means leveraged longs are paying a premium to hold their positions. It is often read as crowded bullish positioning.
- Funding is a cost for position holders: a 0.01% rate every eight hours is about 0.03% a day, or roughly 11% a year on the position’s notional value if it persisted.
- Different exchanges have different rates and intervals; ours shows one venue at a time and labels it.
Mark price and index price
The index price is an average of spot prices across several exchanges. The mark price is the exchange’s fair-value estimate for the contract, derived from the index, and it is what most exchanges use to trigger liquidations. That is why a brief spike on one exchange’s last-traded price does not necessarily liquidate positions there.
Open interest
Open interest (OI) is the total size of open futures contracts. It rises when new positions are opened and falls when they are closed. Rising price with rising OI suggests new positions are driving the move; rising price with falling OI suggests shorts are closing. OI alone does not tell you whether those positions are long or short — every contract has both a buyer and a seller.
Long/short ratios
Exchanges publish the ratio of accounts (or positions) that are net long versus net short. A ratio of 2.0 means twice as many accounts are long as short. This counts accounts, not money: many small long accounts can be outweighed by a few large short ones. Treat it as a sentiment gauge for that exchange’s users, not the market.
Liquidations
When a leveraged position’s margin falls below the maintenance requirement, the exchange closes it: a liquidation. Clusters of liquidations often accompany sharp moves, as forced selling (or buying) pushes the price further.
Our live feed listens to public exchange streams and totals what arrives while your page is open. Free public feeds do not provide complete historical totals, and some exchanges throttle the stream to the largest order per symbol per second, so the figures are indicative, not exhaustive.
Common misreadings
- Treating any single metric as a signal. Each is context, not a forecast.
- Ignoring the venue. Most free data is per-exchange.
- Forgetting delays. Public data can lag, and some of our multi-asset prices are delayed by design.
For how these concepts interact with automated strategies, see Grid vs DCA bots. Nothing on our markets pages is a recommendation to trade; see our risk disclaimer.
Frequently asked questions
What does a positive funding rate mean?
Longs pay shorts. It usually means leveraged traders are mostly long and willing to pay to keep positions open; very high funding signals crowded positioning.
What is open interest in crypto futures?
Open interest is the total number or value of outstanding futures contracts that have not been closed. Rising open interest with rising price suggests new money entering long positions.
Are liquidation data and long/short ratios reliable signals?
They are useful context, not signals on their own. Exchanges publish them differently and with delays, and liquidation feeds may be sampled (Binance sends at most one order per symbol per second).
This guide is general information, not financial advice. Crypto assets are volatile and you can lose all the money you invest. See our risk disclaimer.