Trading Journal
A record of every trade, including the reasoning behind it and the result.
Also called: journal · trade log
Written by Javier Sánchez Ros
In plain language
A journal captures what a broker statement cannot: why you took the trade, what you expected, how you felt, and whether you followed your rules.
The useful fields are the ones that enable analysis — setup type, planned entry versus actual fill, R-multiple, and whether the plan was followed.
Over enough trades a journal reveals patterns that are invisible in the moment: which setups actually pay, and which times of day quietly cost money.
Worked through
What forty logged trades revealed that memory had not
- Remembered win rate
- "about half"
- Actual win rate
- 43%
- Morning trades
- +11R
- Afternoon trades
- −7R
The trader knew the strategy worked and could not say why some weeks were flat. Forty rows of data answered it in one sort: the edge lived entirely in the first two hours, and the afternoon trades — taken out of boredom, on thinner setups — were giving most of it back.
Nothing about that is visible from memory. Memory keeps the trade that hurt and the trade that felt brilliant, not the quiet cluster of small afternoon losses that never registered as an event.
Which is why the fields that matter are the boring ones. Entry, stop, size, exit, time of day, and the reason the trade was taken — recorded before the outcome is known, because a reason written afterwards is a justification.
Forty trades is not a lot and it was already enough to change what this trader does on a Tuesday afternoon. The journal is not a diary; it is the only instrument that tells you which part of your method is actually paying.
Why it matters
Without a journal, improvement relies on memory — and memory systematically overweights recent and emotionally intense trades.
Common mistakes
- Recording only outcomes, which cannot separate a good process from a lucky result.
- Journaling only losses, producing a permanently distorted picture.
- Collecting data for months without ever reviewing it.
Keep exploring
These concepts are connected. Understanding one usually makes the next one easier.
A written set of rules defining what you trade, how you size it, and when you exit.
A trade’s result expressed as a multiple of the amount you originally risked.
The average amount you expect to win or lose per trade over a large sample.
The percentage of your trades that close at a profit.
Overweighting recent outcomes when judging what is likely to happen next.