Build the habit / review

How to keep a trading journal that teaches you something

A trading journal is a record of decisions made under uncertainty. Its value is not the number of screenshots or the elegance of a spreadsheet; it is whether the record helps you identify repeatable behaviours. Capture what you knew before the result was visible, then review a group of decisions together.

Process9 min readUpdated for launch
FIELD NOTEhow to keep a trading journal
Learn the language
then test the idea.
After this lesson
  • Set up the minimum fields for a journal entry.
  • Separate process quality from profit or loss.
  • Turn recurring errors into one measurable experiment.

The pre-trade record

Before entry, write the market, timeframe, context, setup, trigger, invalidation, size, planned risk and expected costs. Add one sentence about why the idea is worth considering and one sentence about what would prove it wrong.

This prevents hindsight from rewriting the original reason. If the entry was impulsive, record that honestly; the journal is for learning, not for presenting a perfect story.

  • Date and time
  • Instrument and timeframe
  • Setup and trigger
  • Entry, invalidation and exit
  • Cash risk and size
  • Costs and market conditions

Execution is its own category

A plan can be good and execution can be poor. Note late entries, partial fills, slippage, order-type mistakes, platform issues and whether you moved a stop. These details often reveal a practical problem that a win-rate statistic cannot show.

Use a consistent vocabulary so patterns can be counted. ‘Entered late’ is more useful than ‘felt bad’. Emotion can still be recorded, but connect it to an observable action.

Working modelReview value = original plan + execution facts + repeatable lesson

Review by sample, not by mood

Review ten or twenty comparable decisions together when possible. Look at average risk, rule adherence, time of day, setup type, costs and maximum adverse movement. A single outcome can be lucky or unlucky; a sample can reveal a process pattern.

Choose one change for the next sample. For example: no entries during a defined news window, or every trade must include a written invalidation before an order is sent.

Worked example

A useful review note

‘The setup met the rule, but I entered two candles late and doubled the planned risk. The result was profitable, yet the process was a fail. Next sample: size must be entered in the ticket from the calculator before the order is submitted.’

Quick review

Carry these four ideas forward.

  • Write before the result is known.
  • Record execution facts.
  • Review comparable samples.
  • Change one behaviour at a time.
Check your understanding

Three questions before the next tab.

Choose the answer that best matches the lesson. This is a memory check, not a market signal.

Not started
01What should a journal capture?
02What is pre-commitment for?
03How should a sample be reviewed?
Common questions

Before you move on

Do I need a paid journal app?+

No. A consistent spreadsheet or notebook is enough. The quality of the questions matters more than the tool.

Should I record winning trades?+

Yes. A win can still contain a rule break, poor sizing or lucky execution, and a loss can still be well planned.

How often should I review?+

A short weekly check can catch process issues, while a deeper review after a defined sample can reveal stronger patterns.