I just saw many new traders making the same mistake: they don’t really understand what PnL is and how it impacts their decisions.

Look, PnL is simply Profit and Loss, the number that tells you whether you made or lost money on your trades. It seems obvious, but most people don’t track it properly. Some don’t even know how to calculate it in personal finance, and that’s a problem.

The interesting part is that many traders confuse PnL with luck. They think that if they win a trade, it’s skill, and if they lose, it’s bad luck. But here’s the reality: PnL is your mirror. It shows exactly how you’re trading, whether you have discipline or if you’re just blindly gambling.

That’s why it’s critical: PnL isn’t just a number, it’s your diagnostic tool. When you monitor it constantly, you start to see patterns. You see when your strategies work and when they don’t. That’s what separates those who make consistent money from those who lose.

Now, here’s the advice that really matters. It’s not about winning every trade—that’s impossible. The key is that your gains significantly outweigh your losses in the long run. That’s smart finance. Professional traders understand this from day one: risk management is what keeps you in the game.

If you’re not regularly reviewing your PnL, you’re leaving money on the table. It’s that simple. Discipline in analyzing your PnL is what separates those who last in trading from those who disappear in three months.