A trading journal is the written record of what the market was showing, what you read into it, and what you did next, trade by trade. It is not a position history: your broker already keeps that one, and it holds none of your reasons. The journal keeps the decision itself, the one piece no account statement preserves.
The word covers two different objects: a performance record, which counts results, and a decision journal, which keeps reasons. This page is about the second one.
What a journal is actually for
An account statement answers one question: how much. It does not tell you whether a losing trade came from a wrong read or from a correct read executed too early, and those two cases call for opposite corrections. The journal makes them distinguishable after the fact. It produces a measurable gap between three things: what the structure was showing, what you read, what you did. When all three line up, the execution was clean, even if the trade lost. When they diverge, the point of divergence is what you can work on.
What actually belongs in it
The temptation is to log everything. A journal that is too heavy stops being kept after three weeks, and a journal you do not keep is worth nothing. The useful content fits in a few fields, and they get filled in before and during, never only after.
- The context read before entry. What market structure was showing, and on which timeframe you read it. Written afterwards, this field is contaminated by the outcome.
- The reason for entering, in one sentence. If it takes a paragraph, there was probably not one reason but several stacked on top of each other.
- The risk accepted, in dollars and in points. That is what makes two trades comparable when position size changes.
- The exit plan decided in advance, and, separately, the actual exit. The gap between the two is the most expensive information in the journal.
- What happened after you exited. Not to regret it: to find out whether your level was badly placed or your patience was short.
- The state you were in when you decided. One word is enough. This field looks soft, and it is the only one that explains streaks.
A screenshot taken at entry replaces three fields on its own, provided it is taken before the exit.
The day you log is not the calendar day
A journal dates its rows, and that date is less obvious than it looks on futures. The official contract specifications for the Micro E-mini S&P 500, published by CME Group, describe a Globex session running from Sunday 6:00 p.m. to Friday 5:00 p.m. Eastern time, with a daily maintenance break from 5:00 p.m. to 6:00 p.m.
In other words, the official session starts the evening before the day it carries. A trade taken at 7:00 p.m. Eastern on a Monday belongs to Tuesday's session. If your journal files it under Monday while your prop firm counts the day the way the exchange does, the two counts diverge, and you only notice when a qualifying-day count or a daily loss limit lands differently than expected.
The field to add is simple: the session date, next to your local time. The time zone gets written once at the top of the journal, not on every row.
A symbol without its expiry makes a journal unreadable
The same official page states that the contract is listed quarterly, in March, June, September and December, with five consecutive quarters listed at once. A journal that logs MES without the expiry becomes ambiguous at the next roll: the archived levels belong to a contract that is no longer the one you trade, and the price gap between two expiries is enough to distort a review.
Account rules need dates too
A journal kept on a prop firm account depends on rules that change: daily loss limit, drawdown mode, consistency requirement. A row written under an old threshold can only be read correctly if that threshold is written next to it. The fix is a habit: one dated row for every rule change you observe, with its source. The prop firm rule change log does exactly that for the firms we track.
The classic mistake
The most common mistake is filling the journal once a week, from memory. What comes out is a reconstruction: memory rewrites reasons to fit the results you already know, and losing trades inherit reasons they never had.
The second is logging only the trades you took. The setups that met your conditions without being executed say as much about your execution as the ones you traded.
What a journal does not tell you
- It does not validate a method. A few dozen rows are not a sample. A journal shows behavioral patterns; it does not demonstrate an edge.
- It does not replace a plan. It records the gap to the rule; the rule still has to exist and be written down first.
- It fixes nothing on its own. Reviewed once a month with no line of the plan changing afterwards, it is an archive, not a tool.
Frequently asked questions
What is a trading journal?
It is the written record of what the market was showing, what the trader read into it and what they did, trade by trade. It differs from the broker's position history, which keeps the results but none of the reasons behind the decision.
What should you write in a trading journal?
The context read before entry, the reason for entering in one sentence, the risk accepted, the exit plan and the actual exit, what happened afterwards, and the state you were in when you decided. Context fields are filled in before the exit, not after.
Should you keep a trading journal in Excel?
The format matters less than when you type. A spreadsheet works if the context fields are filled in before the trade is closed; it becomes a reconstruction if it is completed from memory over the weekend.
Which date should an overnight futures trade be logged under?
Its session date, not the local calendar date. The Globex session for the Micro E-mini S&P 500 runs from Sunday 6:00 p.m. to Friday 5:00 p.m. Eastern time, so an evening trade belongs to the next day's session.
Going further
A journal is only worth keeping if it records a read defined in advance: the framework is described in structured market reading, and convergent reading in the article on confluence. The short definition sits in the structured trading glossary, and the full execution process on the Ephore Prop System page.
Session hours and expiry schedule reviewed on the official CME Group contract specifications for the Micro E-mini S&P 500 on September 21, 2026. These rules change often: always check the official source before trading.
Futures trading involves substantial risk of capital loss. This article is educational and does not constitute investment advice.