The last price and mark price you see on the futures trading screen are not the same. This is not a display error—it is intentional. The last price is the most recent trade price, while the mark price is the "fair price" used to calculate your profit and loss and liquidation risk.
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Core Differences Between the Two Prices
Last Price: This is the price of the most recent contract trade. It reflects the actual price at which someone just traded on Binance.
Mark Price: This is the estimated fair value of the contract, also called the "mark-to-market" price. It is not a single trade price. Instead, it is calculated using spot prices from multiple major exchanges, funding rates, order book depth, and other factors to create a smoother reference price.
Binance has used a simple comparison: the mark price is like the "national average gasoline price," while the last price is "the price at the gas station near your home."
Why Are There Two Prices?
The main reason is to prevent you from being liquidated by sudden price spikes or wicks.
Futures markets can sometimes experience violent short-term price swings. For example, a large order may instantly push the price down and then back up. If your profit and loss and liquidation were based on the last price, that brief move could trigger your forced liquidation, and by the time the price recovered, you would already have been wiped out. That would be unfair.
Binance futures always uses the mark price, not the last price, to trigger forced liquidation. Even if the last price briefly drops to your liquidation price, your position will not be liquidated as long as the mark price has not reached it. This mechanism is designed to reduce the impact of market manipulation and short-term abnormal volatility.
Where Each Price Is Used
| Use Case | Last Price | Mark Price |
|---|---|---|
| Forced Liquidation | ❌ Not used | ✅ Used as the trigger |
| Unrealized PnL | ❌ Not used | ✅ Used as the calculation basis |
| Realized PnL | ✅ Used | ❌ Not used |
| Placing Orders | ✅ The price you see when trading | ❌ Not used as a trading reference |
In short, the last price is what you use for trading, placing orders, and watching real-time trades. The mark price is what determines the PnL shown in your account and whether you will be liquidated.
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Is a Large Gap Between Last Price and Mark Price a Bad Thing?
Not necessarily. A large gap usually means there is currently a liquidity or trading activity issue in the contract market, such as a large sell order, a thin order book, or a temporary divergence between the futures and spot prices. However, if the gap keeps widening for a long time, you should pay attention to your position risk. If the mark price is trending toward your liquidation price, your liquidation risk is increasing, regardless of what the last price is doing.
How to check the mark price: On the Binance futures interface, click the price display area on the chart to switch between "Last Price" and "Mark Price." It is recommended to switch the main chart price display to "Mark Price" so that the price movement you watch is the one that actually determines whether you get liquidated. This is more useful than staring at the last price.
