Recently, I’ve found that many beginners still have misunderstandings about liquidation. Today, I’m going to break this down and explain it clearly.

Simply put, liquidation is when, in leveraged trading, you lose up to a certain amount, and to protect itself, the trading platform forcibly sells your position. It sounds brutal, but this mechanism is actually necessary.

The core logic comes down to two words: margin and leverage. If you put up 1,000 as margin and use 10x leverage, you can trade contracts worth 10,000. It sounds great, but the risk is amplified by 10x as well. When the market moves in the opposite direction, your losses will quickly eat into your margin.

How does it happen, specifically? The platform sets a maintenance margin rate, for example, 0.5%. When your account equity (the money you have left) drops below this requirement, the system will automatically issue a liquidation notice, and then sell all of your positions at market price.

Let’s make it more intuitive with an example. Suppose BTC is 60,000 right now. You put in 1,000 USDT as margin to go long with 10x leverage. The value of your position is 10,000. If the maintenance margin is 50, then your maximum loss is 950. In terms of price, that’s about a 9.5% drop—liquidation would occur when BTC falls to 54,300. It sounds like there’s plenty of room, but in real trading, intraday fluctuations are often faster than you think.

There’s one particularly important detail here: liquidation is triggered by the “mark price,” but when the platform actually closes the position, it uses the “latest price.” The mark price is calculated based on a weighted average of the spot index, with the purpose of preventing malicious price dumps that would cause a large number of users to be liquidated unfairly. The latest price is the real-time order-book price.

So the liquidation process is like this: First, the mark price reaches the liquidation line, and the system determines that the trigger conditions are met. Second, the platform sells your position to the market using a market order, filling it at the latest price at that time. If liquidity is poor or volatility is especially extreme, your actual liquidation price may be much worse than the mark price—this is what’s called slippage.

The most terrifying scenario is a liquidation gap. In an extreme crash like a flash crash, the latest price may instantly jump past the mark price. The system may not have time to liquidate, and the final liquidation price can be far below the liquidation price, causing your losses to exceed your initial margin and turning your account negative. That’s also why large platforms set aside risk reserves—to handle situations like this.

Contract trading is different from options. Contracts have liquidation risk, and losses can consume your entire margin. Options buyers don’t have this problem—at most, they can lose the premium, and they won’t be liquidated.

Put simply, understanding the liquidation mechanism and strict risk control is basic skill when trading contracts. Otherwise, a simple pullback will get you knocked out immediately, with no chance to wait for the market to recover.