Recently, I noticed that many people are still a bit confused about the concept of PnL. In fact, this fundamental term in finance is especially crucial in trading.

PnL stands for Profit and Loss, simply meaning how much you have earned or lost. In trading and investing, this metric provides a straightforward reflection of your account performance.

Interestingly, there are two types of PnL. One is realized gains or losses, which means you have already closed or sold the position, and the money has actually entered or left your account. The other is unrealized, also called paper gains or losses, referring to positions you still hold. This part fluctuates with market prices and can look good one moment and reverse the next.

The calculation isn't complicated. The most basic formula is total revenue minus total cost. If you're trading, it becomes (sell price - buy price) × quantity - fees. For example, if you buy 1 BTC at $40,000 and sell it at $45,000, your PnL is a $5,000 profit. It sounds simple, but in practice, there are many details to consider.

Why focus on PnL? Because it directly reflects whether your trading strategy is effective. You can see your performance clearly through PnL data, helping you determine which decisions are right and which need adjustment. For serious traders and investors, PnL is not only a performance indicator but also involves practical issues like tax reporting.

I now often track my PnL on platforms like Gate, which gives me a clearer view of overall financial management. If you want to better understand your trading performance, take some time to grasp this concept, and even create a simple PnL tracking sheet.