Crypto liquidations explained: why one sell-off triggers more

A liquidation in crypto is a forced sale. When you trade with borrowed money and the price moves against you, the exchange closes your position to stop your losses from eating into its loan. You do not pick the moment. A price level set the day you open the trade does, and once it breaks, the sale is automatic.

That one mechanic, repeated across thousands of accounts sitting at the same price, is how a quiet dip becomes a crash in minutes. This guide covers how a single liquidation works, why they chain together into a cascade, and what the record wipeout of October 2025 showed about the real cost of leverage.

What a liquidation actually is

Start with the loan. On a margin or futures platform you can open a position worth far more than the cash in your account. That cash is your margin. The rest is money the exchange is effectively lending you. Put down $1,000 at 10x leverage and you control $10,000 of bitcoin.

Exchanges protect that loan with a floor called the maintenance margin, the smallest slice of your own money a position has to keep behind it. Fall below the floor and the platform force-closes the trade at the going price. That point is your liquidation price, and it is fixed the moment the position opens.

Your leverage decides how close that price sits. A 2x long on bitcoin is only liquidated after a fall of about half. A 50x long is gone after a move of roughly 2%. Small bets survive big swings. Big bets die on small ones. You meet the same force in regulated wrappers too, like leveraged bitcoin ETFs that rebuild their exposure every day.

Here is the math in one case. Take that $10,000 position opened with $1,000 and 10x leverage. Your own money covers about a 10% fall before it runs out, so a drop of roughly 9% is enough to reach the maintenance level and end the trade, before fees. Add more leverage and that cushion gets thinner fast.

A liquidation is not the market judging your trade. It is a lender collecting before your collateral is worth less than what you borrowed. The nearest everyday version is a mortgaged house the bank can sell the instant your equity hits zero. No warning is owed. No vote is taken.

Exchanges and lending apps liquidate differently

The forced sale works one way on a trading exchange and another on a lending app. On an exchange, a liquidation closes a leveraged trade. On a lending protocol such as Aave, you borrow against crypto you deposit, and if that collateral loses too much value, an outside bot can repay part of your loan and take the collateral at a discount.

In both places the trigger is the same idea. Your collateral stopped covering what you owe. What differs is who pulls the trigger and how public it is. On a blockchain, a liquidation is a transaction anyone can watch and race to grab, and the discount, often 5% to 10%, is the reward that pays them to do it.

What happens the moment you are liquidated

Once the liquidation price breaks, a program called the liquidation engine takes over, not a person. It sells your position into the open market as fast as it can. If the sale does not cover what you owe, the shortfall is meant to come from the exchange's insurance fund, a pool built from the fees of earlier liquidations to absorb exactly this.

When that fund runs dry in a fast move, some venues fall back on auto-deleveraging. The exchange closes out the positions of profitable traders on the other side to settle the loss. It is rare and unpopular, because a trader who read the market right can still be pulled out of a winning bet. That is the system protecting itself first.

Why one liquidation sets off the next

A liquidation cascade happens when forced sales push the price down far enough to trigger more forced sales. Each wave of selling becomes the trigger for the next. Two conditions make it possible. A lot of leveraged positions bunched near the same price, and an order book too thin to soak up the selling.

Picture a row of dominoes, priced instead of placed. Traders cluster at round numbers and popular entry points, so their liquidation prices cluster as well. The first batch sells into the market. That selling drives the price into the second batch. The engines fire again. All at once.

Thin liquidity is the accelerant. When buyers step back, each forced sale moves the price more than it would in a calm market, so the distance to the next cluster closes faster. Open interest, the total value of leveraged bets still open, measures how much fuel is sitting on the pile. The higher it climbs, the more there is to burn.

Cascades also run the other way. A sharp rally force-closes short sellers, whose positions can only close by buying, and that buying lifts the price into the next batch of shorts. Traders call it a short squeeze. The direction flips. The mechanism does not.

October 2025: the biggest cascade on record

The clearest example came on 10 October 2025. More than $19 billion of leveraged positions were force-closed across the market in 24 hours, the largest liquidation event crypto had recorded, on Coinglass figures reported by CoinGecko and Bloomberg. More than 1.6 million accounts were wiped out.

It started with politics. At about 14:57 UTC, President Donald Trump announced a 100% tariff on Chinese imports on his Truth Social account. Risk assets sold off worldwide. In crypto, where open interest sat near a record $217 billion, the drop reached the first band of liquidation prices and the loop took over.

Bitcoin had touched $122,574 that Friday morning. By 11 October it was at $104,782, down 14.5%. The worst of it was counted in seconds, not hours. The analytics firm Amberdata logged the cascade starting at 20:50 UTC, with $6.93 billion liquidated over the next 40 minutes and $3.21 billion in a single minute at 21:15 UTC.

No single total is settled. The Block counted about $9.55 billion at its evening deadline, before the 24-hour tally climbed past $19 billion. Coinglass later said the real figure may have been higher still, because exchanges report liquidations on different feeds and some undercount. Any one number is a snapshot, not the final word.

One detail matters more than the headline. The sales were final. Spot prices recovered in the days that followed, but nobody who was closed out near $104,000 got their position back. The loss locked in at the low. That is the part leverage keeps quiet until the day it cannot.

What decides whether you get liquidated

Three things set your liquidation risk, and all of them are visible before you place a trade. Leverage is the first. Higher leverage pins the liquidation price closer to your entry, so a smaller move ends the position.

Your margin mode is the second. In isolated margin, only the cash assigned to one trade is exposed, so a liquidation there leaves the rest of your balance alone. In cross margin, your whole balance backs every open position. That buys more room before a liquidation and puts everything at risk when one finally lands.

Market conditions are the third, and the only one you cannot set yourself. A position that looks safe on a flat afternoon can be reached in seconds when liquidity dries up, as October 2025 showed. Funding costs, weekends and thin trading hours all change how fast a price can travel. A buffer sized for a calm Tuesday is not a buffer for a tariff headline.

None of this argues for using leverage or against it. It is simply how the tool behaves. The exchange is not the other side of your bet. It is a lender that has already priced the exact point where it stops carrying your risk.

How to read liquidation data

Liquidation trackers from Coinglass and others show how much was force-closed, split into longs and shorts, across exchanges and time windows. Read them as weather, not forecast. A spike tells you leverage just got flushed out of the market, which often clears the way for steadier trading. It does not tell you where the price goes next.

Two readings are worth knowing. Open interest shows how much leveraged money is in play. The long and short split shows which side just took the hit. When open interest is high and still climbing, the conditions for a cascade are building, whichever way it ends up breaking.