If you've been trading for any length of time, someone has told you to keep a trading journal. The advice is universal — from Reddit threads to professional mentorship programs to prop firm training materials. But nobody tells you exactly what that means in practice. What should you actually write down? How often? What do you do with the data once you have it? And at what point does a spreadsheet stop being enough? This guide answers all of those questions, from first trade entry to full behavioral analytics. ## Why Keep a Trading Journal at All? Let's start with why this matters, using a specific example. Imagine you've been trading for 3 months. You're breakeven overall — some winning weeks, some losing weeks. You feel like you're making progress but can't quite prove it. Without a journal, here's what you know: - Your account balance (up or down from starting point) - A vague sense of "I do better in the morning" - Some trades you remember being particularly good or bad With a journal, here's what you can know: - Your exact win rate, average win, average loss, and expectancy - Which hours of the day are profitable and which aren't - Which symbols make you money and which drain your account - Whether your revenge trading habit is getting better or worse - How much trading fees are eating into your profits - Whether your average hold time has changed The difference is the gap between feeling and knowing. Feelings change with your mood. Data doesn't. ## What to Track: The Minimum Viable Journal You don't need to track 50 fields per trade. Start with the essentials: ### Required Fields | Field | Why It Matters | |-------|---------------| | **Date/Time** | Identifies when you trade best/worst | | **Symbol** | Shows which instruments are profitable | | **Side** (Long/Short) | Reveals directional bias | | **Entry Price** | Needed for P&L calculation | | **Exit Price** | Needed for P&L calculation | | **Size/Quantity** | Shows position sizing patterns | | **P