A trading journal becomes far more useful when it records process mistakes as well as outcomes. The goal is not to label every losing trade as a mistake, but to separate a well-executed loss from a decision that broke your plan.
A mistake is not the same as a loss
A trade can lose money while being executed exactly as planned. A winning trade can still contain poor sizing, an impulsive entry or an unplanned exit. Mixing outcome with decision quality makes the journal much less informative.
How to classify mistakes
- Entry: anticipating a signal, chasing price or entering without a valid condition.
- Risk: incorrect size, moving a stop without a rule or taking too much exposure.
- Management: improvised partials, emotional exits or changing targets without criteria.
- Discipline: trading outside the defined session, strategy or market.
- Preparation: ignoring events, context, liquidity or checks required by the plan.
What to record
Store the mistake type, a short description, its estimated impact in money or R, and whether it is recurring. Add context such as strategy, timeframe, market, time, direction and plan adherence. With enough trades you can ask questions such as “which mistake costs me the most?” or “where do management errors cluster?”.
Analyze without turning the review into self-criticism
Measure frequency and impact separately. A frequent small mistake may need a different response from a rare but expensive one. Review patterns over blocks of trades rather than overreacting to one or two sessions.
Turn every review into an action
A useful review ends with an observable rule: wait for candle close, reduce size after a defined loss, never move a stop without a specific condition, or stop trading after a daily limit. Then track several trades to see whether the intervention reduces the problem.