How to keep a trading journal that changes behavior

9 min read · Updated September 25, 2026

Almost every trader has started a journal at some point. Most of those journals trail off after a few weeks, usually because filling them in felt like homework and nothing much came out of it. The problem is rarely the format. It is that the journal was set up to record trades rather than to change how the trader behaves.

This guide is about the second kind. It covers what to log, a simple routine around each session, and, most importantly, how to review what you have written so it actually leads somewhere.

Start with the purpose

A trading journal has two jobs. The first is to show you what is working, so you can do more of it. The second is to show you what your mistakes cost, so you can do less of them. Everything you log should serve one of those jobs. If a field never gets used in a review, drop it. A short journal you keep is far more valuable than a detailed one you abandon.

What to log for each trade

Your platform already records the basics: instrument, direction, entry, exit, size and result. A journal adds the context the platform cannot see.

The setup

Name the setup you were trading, using the same names every time. "Opening range break," "pullback to VWAP," whatever your playbook calls them. Consistent names are what let you compare setups later. If a trade did not fit any of your setups, label it that way too. Those trades are often the most informative.

Planned risk and R-multiple

Record where your stop was when you entered, and therefore how much you planned to risk. That planned risk is your "R." A trade that made twice what you risked is +2R; a trade stopped out as planned is -1R. Thinking in R lets you compare trades of different sizes and see whether your losses stay at the size you intended. A loss of -2.5R on a trade planned for -1R tells you something went wrong in execution, regardless of the dollar amount. The position size calculator can help you see how stop distance and size relate.

Emotion going in

One or two words about how you felt when you entered. Calm, anxious, impatient, confident, frustrated, bored. Log it before you know the outcome if you can, because the result will color your memory.

Mistakes

Tag anything you did outside your plan: moved the stop, chased the entry, sized up, exited early out of fear, took a trade outside your session. Use a fixed list of tags so they can be added up. "No mistake" is also a valid and useful tag.

Screenshots

A screenshot of the chart at entry and exit is worth more than a paragraph of notes. Weeks later, it lets you see what you actually saw, instead of what you remember seeing. TradeHarbor lets you attach screenshots to each trade, but a folder with dated filenames works too.

Before the session: plan and check in

A few minutes before the open can change how the rest of the day goes.

Pre-session plan

• Key levels or context you are watching.
• Which setups you expect to be relevant today.
• Your personal risk rules for the day: max trades, stop after a set number of losses, personal daily loss line, daily goal.
• Any scheduled events you plan to avoid trading around.

Check-in

Rate a few things on a simple scale: sleep, stress, focus, mood and confidence. It takes less than a minute. Over time, comparing these ratings with your results can show you whether certain states line up with your worst days. That is information you can act on, for example by deciding in advance how you will handle a morning after a bad night's sleep. In TradeHarbor you can log this check-in in the journal and see it compared with your results.

After the session: the end-of-day review

Keep it short, ideally ten or fifteen minutes. The goal is to capture what happened while it is fresh, not to write an essay.

• Fill in any missing emotion and mistake tags.
• Did you follow your personal rules? If not, which one broke, and what led to it?
• What was your best-executed trade, regardless of result?
• What is one thing to do differently tomorrow?

Notice the focus on execution rather than profit. A well-executed losing trade is a good trade. A badly executed winner is a warning, because the same behavior will eventually produce a loss.

Log missed trades

Missed trades are setups that met your plan but you did not take. Hesitation, distraction, fear after a loss. They are easy to forget because nothing happened in your account, but they matter for two reasons. First, they show you whether fear is costing you valid opportunities. Second, a missed trade often leads to a chased trade later, and logging it helps you see that link. Note the setup, the time, and why you did not take it.

The weekly review: where change happens

Daily reviews capture data. The weekly review is where you look across it. Set aside a fixed time, perhaps thirty to sixty minutes at the end of the week.

Add up the cost of each mistake

For every mistake tag, total the result of the trades that carry it. This is often the most eye-opening number in the whole journal. You may find that one or two tags account for a large share of your losses. That tells you exactly what to work on next week.

Compare setups

For each setup, look at the number of trades, win rate and average R. Are some setups carrying the account while others drag it down? Are you taking trades that fit no setup at all, and how do they perform?

Check your rule adherence

How many trades broke a personal rule this week? How did those trades perform compared with the ones that did not? A simple count, tracked week over week, is one of the clearest measures of progress you can have. TradeHarbor summarizes this as a discipline score and flags the individual trades that broke your rules.

Look for patterns

• Trades after a loss versus after a win.
• Results by trade number of the day.
• Trades after a pause versus jumping straight back in.
• How long you hold winners compared with losers. If losers are held much longer, that is the disposition effect at work.
• Days where you gave back an early gain.
• The day after a big losing day.
• Check-in ratings compared with results.

Pick one thing

End the review by choosing a single focus for the coming week. Not five. One behavior, stated specifically: "no trades within five minutes of a loss" or "no setups outside my playbook." Next week, check whether it happened.

Common journaling mistakes

• Only logging losing days. You need the good days too, both for comparison and to see what you do right.
• Writing stories instead of tags. Long narratives are hard to add up. Tags and short notes are easier to review.
• Judging by outcome. A winning trade that broke your rules is still a rule break. Log it that way.
• Never reviewing. Without the weekly review, the journal is a diary.
• Being too harsh. If every entry is self-criticism, you will stop opening the journal. Record facts, not verdicts.

Closing thoughts

A good trading journal is less about writing and more about counting. It turns "I think I overtrade on Fridays" into a number, and a number is something you can work on. Start small, stay consistent, and let the weekly review decide what you change.

If you have not yet written down the playbooks and rules your journal will measure against, trading plans and checklists is a good next step. For the psychology behind the patterns you may find, see the trading psychology overview, revenge trading and overtrading.

This guide is educational and is not financial or trading advice.