Liquidation is the forced closure of a leveraged position when remaining margin can no longer cover maintenance requirements. The venue sells or buys the position back into the market to stop losses from exceeding the trader collateral. In crypto perps and margin products, liquidations are routine plumbing, not rare edge cases.
Why it matters
Liquidations turn small moves into larger ones when many positions share the same pain level. A break below a crowded long cluster can trigger market sells that push price lower, which triggers the next cluster. The same loop works upward against crowded shorts. Cascades explain why some crashes and squeezes look mechanical rather than purely news-driven.
Desks track estimated liquidation maps, open interest, and leverage distribution when available. Those tools are imperfect, but they flag where forced flow may appear. High leverage plus thin books is a recipe for overshoot. After a cascade, the tape can snap back once forced sellers are done, which is why rebound speed after a flush is a useful tell.
Liquidation risk is not only for the person being closed. Nearby traders feel the slippage and volatility. Insurance funds and auto-deleveraging rules decide who eats residual losses when a position cannot be closed cleanly. Venue design matters as much as your personal stop.
Simple example
Longs pile into a bitcoin perpetual near a clear support zone with high leverage. Support breaks. Liquidation engines hit market sells. Price drops through levels that would have held on a spot-only day. Spot may follow, but the first fuel was forced futures closing. That is a liquidation cascade in plain terms.
After a cascade, desks separate forced flow from fresh discretionary selling. If liquidations pause and bids stabilize, the flush may be finished. If open interest rebuilds at the same leverage, the same pain zone can reload quickly.
Related terms
See perpetual futures, funding rate, leverage, margin, and order book. Browse more in the crypto glossary.