Foundations
What is a trading journal?
“What is a trading journal, and how is it different from my broker statement?”
A trading journal is a record of every trade you take, kept in a form you can query later. A broker statement records the same fills for tax and settlement; a journal records them for analysis, and adds the context a statement has no field for.
In short
A broker statement is what happened to your money. A journal is what happened to your money plus everything you knew at the time — which is the only version that can be grouped, filtered and compared.
What a broker statement leaves out
A statement is complete about execution and silent about intent. It records that 200 shares were bought at 41.20 and sold at 40.15; it records nothing about why the trade was taken, where the stop was meant to be, whether it was the setup you planned or the third re-entry after two losses, or how far the position ran in your favour before it turned.
None of that is sentiment or diary-keeping. Each one is a field you can group by later, and a question you cannot answer without it: whether one setup accounts for most of the losses, whether the trades taken after a loss are sized differently from the rest, whether targets are being reached and given back.
What a journal entry usually holds
Beyond the fills themselves — symbol, direction, quantity, entry, exit, fees and timestamps — the fields that make a book queryable are the ones describing the decision:
- The planned stop and target, recorded before the outcome is known. Without them there is no R-multiple and no way to tell a plan that worked from one that was abandoned.
- A setup or strategy tag, so trades can be grouped by the thing they have in common rather than by symbol.
- Mistake tags, which is how a book answers "what goes wrong" without anyone having to remember.
- Notes and lessons, written at the time. A note written a month later is a memory of a memory.
- The excursions — how far price ran for and against the position while it was open (MAE and MFE).
Why the record has to be complete before it is useful
Every statistic a journal produces is a property of the sample it is computed from. A win rate over the trades someone remembered to log is a win rate over the trades someone remembered to log — and the ones left out are rarely a random selection.
This is the argument for importing rather than typing: a CSV from the broker or a direct sync brings in every fill including the ones nobody wants to look at, and the journal's job becomes adding context to a complete record rather than assembling the record itself.
What a journal cannot do
A journal is a record and a set of measurements over that record. It describes what happened; it does not forecast what happens next, and a statistic computed over 30 trades is a statement about 30 trades.
Questions
- Is a spreadsheet enough?
- For recording fills, yes — a spreadsheet is a perfectly good store. The work it does not do is the grouping and filtering: comparing setups, isolating trades taken after a loss, or tracking how far each position ran against you needs those fields in a shape that can be queried, and that is what a journal application maintains for you.
- How many trades before the numbers mean anything?
- There is no single threshold, and any figure quoted as one is a simplification. What is true is that every statistic carries the uncertainty of its sample size: a win rate from 20 trades has a wide error bar around it, and the calculators that scale by sample size cap that scaling for exactly this reason.
- Does journaling include screenshots?
- Often, and for a specific reason: a chart image captures the context that no numeric field holds — what the surrounding structure looked like at entry. It is a record of what was on screen, not an annotation added later.
Calculate it
In the app
- What is Ledger of Alpha?A quick overview of the trading journal and what it can do for you.
- Adding your first tradeLog a trade manually from the entry page in a couple of minutes.
- Journaling and reviewing tradesAdd notes, ratings, mistakes, and lessons to build discipline.
- Importing a CSV fileDrop an export from a supported broker and preview before importing.
Keep reading
Ledger of Alpha is the record these measurements are computed from. See the full product
Keep the record it all comes from
These measurements need a complete book of trades behind them. A free account gives you somewhere to keep one.