Recently, I realized something that many beginner traders don't understand well: PnL is not just a number on the screen; it's your real thermometer in the markets.

PnL stands for Profit and Loss, basically your gain or loss on each trade. But here’s the interesting part: it’s not just a passive indicator you look at at the end of the day. It’s the tool that tells you whether you’re really doing something right or if you’re just lucky.

Most believe that trading means always winning. Nothing could be further from the truth. I’ve seen traders who win on 40% of their trades but still end up with positive numbers at the end of the month. How? Because they understand what PnL really is and how to use it to their advantage. When they lose, they lose little. When they win, they win more.

That’s what separates those who last in this from those who disappear. PnL forces you to be honest with yourself. You can’t hide a bad trade or pretend your strategy works if the numbers say otherwise. Managing your PnL is controlling your discipline.

My advice: stop focusing on always winning. Focus on making your profits exceed your losses in the long run. That’s real trading. Learn to manage risk on each trade, review your PnL regularly, adjust what doesn’t work. That’s what differentiates professionals from those betting blindly.