Open Interest Explained: Reading Leverage and Liquidation Risk
Open interest (OI) is the total number of outstanding perpetual contracts that haven’t been closed. It measures how much leveraged positioning is stacked in a market — and when it moves against a flat price, it’s often the warning sign before a violent unwind.
What open interest measures
Every open perp contract has both a long and a short behind it. Open interest counts those open contracts: rising OI means new positions are being opened; falling OI means positions are being closed. Volume tells you how much traded; OI tells you how much is still at risk.
A price move on rising OI is backed by fresh money and is more likely to persist. The same move on falling OI is positioning being unwound — a weaker signal.
The setups that matter
- Price flat + OI rising: leveraged positions are building. Whoever is wrong could be forced out in a cascade.
- Price up + OI rising: new longs are adding — momentum with fuel, until funding gets extreme.
- Price up + OI falling: shorts are covering. It can look strong but often runs out of buyers.
- OI spike + extreme funding: crowded, expensive positioning — the classic squeeze setup.
From liquidation to cascade
When a position is liquidated, its margin is used to close the losing side, which can push price further against the next weakest position — a liquidation cascade. Exchanges manage this risk with mark-price-based liquidations and last-resort mechanisms such as auto-deleveraging (ADL), where profitable traders absorb the shortfall of a bankrupt position.
You can’t prevent a cascade, but you can avoid being the fuel: don’t add leverage into crowded positioning, and know your liquidation price before you enter.
Where to watch open interest live
Open interest is visible on the live BULK trading interface for each market, next to funding and order flow. The pair pages on this site link straight to the live view for every tracked market with code YETI (?ref=YETI) already applied — open BTC-USD or ETH-USD via https://app.bulk.trade/trade/ETH-USD?ref=YETI and OI is on the same screen as the book.
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Frequently asked questions
What is open interest in simple terms?
Open interest is the total number of open perpetual contracts. It measures the size of leveraged positioning currently at risk in a market, as opposed to volume, which measures how much has already traded.
Does rising open interest mean the price will go up?
No. Rising OI means more positions are opening on both sides. The question is which side is gaining — combine OI direction with price and funding to read it. Rising OI plus falling price usually means shorts are adding.
What does rising open interest with falling price mean?
It usually means new short positions are being opened rather than longs covering. That setup can fuel further downside — or end in a violent short squeeze if price reverses and crowded shorts are forced to buy back.
What is a liquidation cascade?
A liquidation cascade is a chain of forced liquidations in which each forced close pushes price against the next weakest leveraged position. It typically follows a build-up of one-sided positioning — the classic warning sign is rising OI with an extreme funding rate.
What is auto-deleveraging (ADL)?
ADL is a last-resort mechanism exchanges use when a liquidated position’s margin cannot cover its loss: profitable traders on the opposite side have positions reduced to absorb the shortfall. BULK documents its ADL and underfill handling in its docs.
How do I check open interest on BULK before a trade?
Open interest for each market is on the live BULK interface. Open the market through a code-YETI link on this site — such as https://app.bulk.trade/trade/BTC-USD?ref=YETI — and check OI alongside funding before sizing a position.
Positioning & OI research
BuiltOnBulk's landscape research on open interest, volume and the Solana perp market.
- State of Solana Perps 2026 — Record volumes and the post-Drift landscape.
- BULK markets list — Current markets and where OI concentrates.
BuiltOnBulk is an independent analysis site, not BULK Exchange or this network. Technical claims there are verified against BULK's official docs (docs.bulk.trade).