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How to Keep a Trading Journal That Teaches You Something

What to record for every trade, a worked journal entry, how to review win rate and expectancy, and the records the IRS expects you to keep anyway.

By Published 4 min read

Reign Creative LLC makes Learn to Trade Stocks Beginner, which this article links to, so we have a commercial interest in it. How we write and check articles.

AI-assisted article. Drafted with AI tools from the sources cited below and checked by automated tests and an AI editorial review. No person has reviewed it yet. How we write and check articles.

Key takeaways

  • A trading journal records not just what you traded but why, what would make you exit, and what you learned.
  • Writing the exit plan, a price target and a stop, before entering makes the risk on each trade a known number you can record.
  • Review trades in batches: win rate alone misleads, so compare average wins and losses and calculate expectancy, including fees.
  • Judge decisions separately from outcomes: a sound plan can lose and a poor one can win.
  • The IRS expects you to keep records that establish basis until the limitation period ends for the year you sell, so a journal doubles as a tax record.

A brokerage statement tells you what you traded. It cannot tell you why, what you expected, or what you would do differently. That is the job of a trading journal. The description of our own simulator, Learn to Trade Stocks Beginner, puts the habit in one line: compare the result with your reason for buying or selling. A journal is where you write the reason down before the trade, so there is something to compare against afterwards.

What to record for every trade

Field Example Why it matters
Date and time 6 Oct, 10:42 a.m. Context: news, session, day of week
Symbol, side, quantity XYZ, buy, 20 shares The basic facts
Order type and time-in-force Limit, day order Explains fills, or the lack of them
Fill price and fees $50.00, $0 commission Needed for basis and true results
Reason "Bounced off support at $49 twice" The hypothesis you are testing
Planned exit Target $58, stop $46 Written before entry, not after
Size and risk $1,000 position, $80 at risk Keeps any one loss small
Result −$84 The outcome
Lesson "Stop filled below $46 after a gap" What changes next time

Time-in-force order types and stop versus stop-limit orders explain the order fields.

Write the exit before the entry

The most useful line in a journal is the one written before the trade: what would make you sell. Deciding a target and a stop in advance turns a vague hope into a testable plan, and it fixes your risk before emotion gets a vote.

A worked entry. Suppose a $10,000 practice balance, and you buy 20 shares at $50.00, with a stop at $46 and a target at $58.

  • Risk per share: $50 − $46 = $4; risk on the trade: $4 × 20 = $80, or 0.8% of the account.
  • Potential reward: $58 − $50 = $8 a share, twice the risk.
  • What happened: the stock gapped down and the stop order filled at $45.80, a loss of $84.

The extra $4 is itself a lesson. The SEC explains that a stop price is not a guaranteed execution price: once triggered, a stop becomes a market order, and the fill can deviate significantly from the stop. The journal records the difference so you learn to expect it.

Reviewing in batches

Single trades are noisy. Review in batches, such as weekly or every 10 to 20 trades, and calculate a few numbers:

  • Win rate: the share of trades that made money.
  • Average win and average loss.
  • Expectancy: win rate × average win − loss rate × average loss, the average result per trade.

Win rate on its own misleads:

Ten trades Win rate Average win Average loss Expectancy per trade Total
Trader A 40% $120 $60 +$12 +$120
Trader B 60% $50 $100 −$10 −$100

Trader B wins more often and still loses money, because the losses are twice the size of the wins. Include fees in every figure: FINRA notes that frequent trading can come with higher costs that might erode your returns, as well as potential tax implications.

Separate the decision from the outcome

A well-planned trade can lose and a reckless one can win. Grade each entry twice: did I follow my plan, and did the trade make money? A string of rule-following losers may mean the rule needs work; a winning trade that broke your rules is a warning, not a success. The app's listing adds a caution about practice records: simulated results cannot predict what will happen in the real market; what paper trading can and cannot teach covers the limits.

A journal is also a tax record

For real trades, the records have a second use. IRS Topic 305 says to keep records relating to property until the period of limitations expires for the year in which you dispose of it, because you need them to figure your basis and your gain or loss. The general limitation period for assessing tax is three years from filing, and longer in some situations, such as six years for substantially under-reported income.

Purchase dates and prices settle questions that statements do not always answer, such as whether a sale was short- or long-term, covered in capital gains on stocks, and whether a repurchase in another account created a wash sale. The SEC also advises checking every account statement and trade confirmation and contacting your firm immediately, by phone and in writing, about errors or trades you did not authorise.

The store screenshots for Learn to Trade Stocks Beginner, one of our education apps, show a trading journal alongside practice trades with a virtual balance. The investing basics hub lists the related guides, including risk tolerance.

Good to know

Frequently asked questions

What should a trading journal include?
For each trade: date and time, symbol, buy or sell, quantity, order type, fill price and fees, your reason for the trade, the planned exit (target and stop), the position's size relative to the account, the result and one lesson.
What is trading expectancy?
The average amount a set of trades makes or loses per trade: win rate × average win − loss rate × average loss. Four winners averaging $120 and six losers averaging $60 give 0.4 × 120 − 0.6 × 60 = +$12 per trade, despite losing most trades.
How often should I review my journal?
In batches, such as weekly or every 10 to 20 trades, rather than after every trade. Single results are noisy; patterns across many trades show whether a rule is working.
How long should I keep trade records for taxes?
IRS Topic 305 says to keep records relating to property until the period of limitations expires for the year in which you dispose of it, because you need them to figure your basis and your gain or loss. The general limitation period is three years from filing, longer in some situations.

Sources

  1. Learn to Trade Stocks Beginner (store listing) (opens in a new tab)Google Play — accessed
  2. Topic no. 305, Recordkeeping (opens in a new tab)Internal Revenue Service — accessed
  3. Frequent Intraday Trading: Understanding the Basics (opens in a new tab)FINRA — accessed
  4. Understanding Order Types – Investor Bulletin (opens in a new tab)Investor.gov, U.S. Securities and Exchange Commission — accessed
  5. Investor Bulletin: How to Open a Brokerage Account (opens in a new tab)Investor.gov, U.S. Securities and Exchange Commission — accessed

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