How to keep a trade journal without paying for one

Most journals fail because they record too much. Five fields is enough to change how you trade.

Journalling has a bad reputation among traders, and it is deserved — not because the practice is useless, but because most people start with a template containing thirty fields, fill it in diligently for nine days, and never open it again. The failure is one of design, not discipline.

A journal that survives contact with a busy week has to be small enough to complete in under a minute.

What to record

That is the whole journal. Notice what is missing: no screenshots, no indicator settings, no emotional essay, no elaborate tagging system. Those fields feel thorough and are the reason journals get abandoned.

The one field people skip and shouldn't

The reason for entry, written in one sentence, before you know the outcome. Written afterwards it is not a record, it is a story — and hindsight will make every winner look planned and every loser look unlucky.

Reading twenty of these back is uncomfortable in a productive way. Patterns emerge that no chart shows: several entries whose stated reason is a variation of "it was moving", or three losses in a row whose reasons are notably vaguer than the winners.

Three numbers, reviewed weekly

1. Win rate against your average R

Neither means anything alone. A 40% win rate is excellent at 3:1 and fatal at 1:1. Read them together or not at all.

2. Average win versus average loss

If your average loss is larger than your average win, you are cutting winners early and letting losers run — the single most common destructive pattern, and one that only shows up in aggregate.

3. Checked trades versus unchecked ones

The comparison that changes behaviour. If trades taken after a completed checklist consistently outperform impulsive ones, you no longer have to take discipline on faith. You have measured it in your own account.

What to review, and when

Weekly, not daily. Daily review encourages tinkering with a system based on noise. Sit down once a week, read the entry reasons, look at the three numbers, and ask one question: what would I change if I could only change one thing?

Where to keep it

Dedicated journalling platforms charge twenty to thirty dollars a month and want an account, an email address and often read access to your exchange. For the five fields above, none of that is necessary.

The Preflight journal stores entries in your browser, calculates all three numbers automatically, and costs nothing. Nothing is uploaded, no account exists, and no exchange connection is ever requested. The trade-off is honest and worth stating: the data lives on that one browser, so if you clear it, it is gone. Export a copy occasionally if the record matters to you.

What to write in the reason field

This single field carries most of the journal's value, and it has to be written before the outcome is known.

A useful entry names the pattern and the level: "reclaim of the weekly level at 62,400 after a failed breakdown, stop below 61,800." An unhelpful one is "looked strong" or "bullish".

The test is whether a stranger reading it a month later could tell what you saw and at what price you would have been wrong. If they could not, neither will you.

The weekly review, in fifteen minutes

1. Read the reason fields only, ignoring outcomes. Patterns in your reasoning appear immediately — several entries whose reason is a variation of "it was moving" is a finding.
2. Check the three numbers. Win rate against average reward, average win against average loss, and checked versus unchecked.
3. Find your worst hour and worst day. Almost everyone has one, and the cheapest improvement available is to stop trading it.
4. Ask one question: if I could change only one thing next week, what would it be? Then change only that.

Weekly, not daily. Daily review encourages adjusting a system based on noise, which is how working methods get abandoned during ordinary losing streaks.

The patterns a journal reveals that nothing else does

• Time of day. Losses concentrated in specific hours, usually thin ones or late-night sessions.
• Sequence effects. The trade immediately after a loss performing far worse than average — revenge trading, measured.
• Setup quality. One pattern carrying your results while another quietly loses money every month.
• Size discipline. Positions larger than planned appearing precisely in your worst trades.
• Holding behaviour. Winners closed in hours and losers held for days — the signature of loss aversion, visible in the average hold time of each group.

None of these is visible from memory, because memory edits. All of them are visible in twenty honest rows.

Keeping it going past week two

Most journals die from ambition. Five fields survive; thirty do not.

1. Log immediately at exit, while the reason is fresh. Batching at the end of the week guarantees invention.
2. Log the bad trades first. A journal missing the embarrassing entries is worse than none, because it produces confident wrong conclusions.
3. Do not add fields until you have used the existing ones for a month.
4. Export quarterly. The tax export produces a clean spreadsheet, which doubles as a backup — local storage lives on one browser.

Turning the record into a decision

A journal that is only read is a diary. The point is that it changes something.

After fifty trades you can answer questions no article can: which setup to stop taking, which hour to avoid, whether your reward ratio is really what you think, and whether the checklist earns its twenty seconds. Feed the win rate and reward ratio into the Monte Carlo panel and you can also answer the largest question — whether your risk per trade is survivable across a normal bad run.

That chain, from honest record to measured decision, is the entire purpose. Everything else is bookkeeping.

Common questions

How many trades before the numbers mean anything?

Twenty gives you a rough picture and fifty a usable one. Below twenty, a single outlier dominates every statistic, which is why early conclusions are usually wrong in both directions.

Should I journal paper trades?

Yes, for learning a process — but treat the results with suspicion. Paper trading removes the emotional weight that causes most real mistakes, so the numbers are systematically better than live ones.

Is a spreadsheet as good as a dedicated journal?

A spreadsheet you actually maintain beats a sophisticated tool you abandon. What matters is capturing the reason before the outcome and reviewing weekly — the format is secondary.