Most traders blow up not because they have bad setups — but because they have no idea what's actually working.

Think about it. You take 50 trades this month. Some hit, some don't. But which setup had the highest win rate? Which time of day were you sharpest? Where are you over-sizing?

If you can't answer those questions instantly, you're flying blind.

The fix is stupidly simple: journal every single trade.

Not in a Notes app. Not in your head. In a real system that tracks your entries, exits, P&L, setup type, and notes — so you can review your data like a business owner reviews their numbers.

The best traders I know treat their trading like a business. They track everything. They know their edge down to the decimal. And they cut setups that aren't profitable fast.

That's exactly what I built PnL Lab for. It's a trade journal and analytics tool for active day traders in stocks and options.

If you're serious about improving, start tracking. The data will tell you everything you need to know.