I've been observing for some time how many new traders make the same mistake: they don't really know how much they're earning or losing. And this is where PnL comes in.

Look, PnL is basically your Profit and Loss, your gain or loss in real numbers. It sounds simple, but that's where many get lost. It's not just about knowing if you had a green or red day; it's about understanding exactly what happened to your capital.

The interesting part is that controlling your PnL isn't about always being right. I know traders who win only 40% of their trades but end up positive at the end of the month. Why? Because they know how to manage risk and let their profits grow more than their losses.

That's the secret that separates those who understand trading from those who are just gambling. Professionals don't obsess over winning every trade. They focus on the long-term average of their gains exceeding the average of their losses.

If you're not regularly measuring your PnL, honestly, you're trading blind. You don't have real feedback on what works and what doesn't. It's like driving without a rearview mirror.

My advice: start recording every trade, study your weekly PnL, identify patterns in your losses. That’s what will take you from amateur to someone who truly understands what trading is and how to make it profitable.