When I started trading futures, it took me some time to understand the two prices that constantly flicker on the screen. It turns out, there's a reason for that — each of them serves its own purpose, and understanding this is critical for risk management.

The thing is, on the futures market, the contract price doesn't always match the spot price of the underlying asset. Why? Because futures have their own demand and supply dynamics. Traders are constantly buying and selling contracts, and trading volume can be huge. As a result, the BTCUSD price, for example, can deviate from the actual Bitcoin spot price. The higher the volatility and volume, the greater this discrepancy.

Here's where an interesting point comes in. Exchanges face a problem: how to protect traders from unfair liquidations during price jumps? The solution is that the marking price is not just the last traded price but a calculated indicator that considers the fair value of the contract.

Simply put, the marking price is the average between the last contract price and the spot price of the asset. It's like averaging gasoline prices at different gas stations to get a more objective picture. The last price is what’s being traded right now on the exchange, while the marking price is a fair estimate of what the actual price should be.

Why is this necessary? Imagine a situation: the futures price suddenly jumps by a few percent due to a spike in orders, but the spot price hardly changes. If liquidation were triggered based on the last price, you would be unfairly closed out. But the system uses the marking price as a reference during liquidation, and this buffer zone protects you.

Another point is the calculation of unrealized profit and loss. Before closing your position, it’s hard to know exactly what your real profit will be. Therefore, systems use the marking price to calculate P&L, giving you a more honest picture of your current position and avoiding unnecessary liquidation triggers.

An important note: the marking price is not the price at which you are actually trading. It’s just an indicator that monitors the risk of your position. Real trading occurs at the last price — the one formed on the market at that moment.

If you trade on any futures market, you can switch between these two prices in the platform interface to see both perspectives simultaneously. This is useful for risk monitoring and understanding where you might get liquidated.

Ultimately, the system works like this: the marking price is a protective tool that makes trading fairer and more predictable. Without it, during volatility, there would be many more unfair liquidations, and traders would be vulnerable to manipulation on a single exchange. So, if you take futures trading seriously, understanding the difference between these two prices is basic literacy.