I'm going to tell you something every trader should know: what that PNL you see on your screen really means every time you trade in digital finance.

PNL stands for Profit and Loss, and in English, it's (Profit and Loss), and basically it's the thermometer of your trade. It shows you exactly how much you gained or lost in a specific trade or during a certain period. It sounds simple, but understanding it well saves you a lot of headaches.

The idea is straightforward: it's the difference between what you paid for an asset and what you sold it for. But here’s the important part, don’t forget to subtract the commissions charged by the exchange. If that difference gives you a positive number, you're in profit. If it's negative, well, you lost money on that trade.

Let's see how it works with real numbers. Say you bought 0.1 BTC when it was at $40,000. You invested $4,000. After some time, you sold it at $42,000 and received $4,200. The gross difference is $200, but the exchange charges a commission, so your actual PNL ended up at $198. That’s what actually goes into your wallet.

Now, here’s something many don’t consider: there are two types of PNL you need to differentiate. There’s unrealized PNL, which is when you still have the position open and your gains or losses only exist on the screen. And there’s realized PNL, which is when you’ve closed the trade and that number has become real, transferred to your balance.

Price volatility plays a huge role here. When the market moves quickly, your PNL can change drastically in minutes. That’s why some traders use leverage, which amplifies both your gains and your losses. More risk, more potential reward, but also more chance of losing everything.

If you want to understand it super simply: it’s like buying a coffee for 50 pesos and selling it an hour later for 70 pesos. Your PNL would be +20 pesos. If you sold it at 40, your PNL would be -10 pesos. In the cryptocurrency exchange, it’s exactly the same, just with much larger numbers that change at lightning speed.

The formula you need to remember is: Sale Price minus Purchase Price, multiplied by the amount of asset you had, minus commissions. That’s your PNL. Positive or negative, it depends on whether you guessed right with your financial strategy at that moment.

Understanding your PNL is the foundation to improve as a trader. It’s not just a number on the screen; it’s a reflection of your decisions.