How to keep a trading journal: separate entry reasons from results and cut down hindsight

Why this moment

When you write a trading journal matters as much as what you write. The reasons for a decision must be written before placing the order, while the result is still unknown, so the result cannot color them. Results are best written after the bar closes. For crypto, on exchanges that split bars on UTC such as Binance and Upbit, the daily bar closes at 9 a.m. Korea time every day; Korean stocks end the regular session at 3:30 p.m., and US stocks end it early in the morning Korea time (5 a.m. during daylight saving time, 6 a.m. otherwise). Fixing these moments when the day becomes final as your recording times means you write results against closed bars rather than the swings of a forming bar. Last comes the review. The weekend, when stocks rest, is a good time to read a week of notes in one sitting. This article covers using a journal not as a ledger for showing off profits or showing others, but as a tool for checking what grounds your decisions came from and whether those grounds were actually confirmed. It does not recommend any particular way of trading.

What to write down

A journal entry needs only enough to bring the scene back later. Too many fields and you stop writing within weeks; too few and when you look back you cannot tell what you based the decision on. The basics are when, what and on which chart. Write the date and time, the asset and exchange, and the bar length you used. Next is the state of the chart at the time. Leave a sentence or two on which way the trend was going, where the nearby support and resistance levels were, and whether volume was higher or lower than usual. Then write the grounds for the decision and the condition under which you would consider those grounds wrong. If you actually traded, note the planned size, the actual fill price and the loss you were prepared to accept, and finally add a short line on your state of mind. Were you rushing, or swayed by the result of the previous trade? A screenshot preserves what the chart looked like beyond what words capture.

• Date and time, asset, exchange, bar length
• The chart's state at the time: trend, nearby levels, volume
• The grounds for the decision and the condition that would prove them wrong
• Planned size, actual fill, loss range you would accept
• Your state of mind at the time and a screenshot

Writing entry reasons and results separately

The most important habit in a journal is writing reasons and results in different fields. The market produces different results from the same reasons every time, so judging reasons by results alone distorts the lesson. Sometimes the reasoning was sound but the result was bad; sometimes the reasoning was sloppy but luck made the result good. By results alone, the first looks like a method to drop and the second like one to keep, but the truth may be the reverse. So when you look back, ask two questions separately. One is whether the grounds you wrote down were actually confirmed: did price react at the level you said you would watch, was the volume condition met? The other is how the result turned out. Putting the two answers side by side lets you tell whether the reasoning held but size or timing was the problem, or whether you entered without the grounds ever being confirmed. The result field is never used to edit the reasons field; it is only added beside it.

Cutting down hindsight

Once you know the outcome, a feeling arises that you knew it all along. This is called hindsight bias, and without a journal the feeling quietly rewrites your memory. If price rose, you remember seeing reasons for it to rise; if it fell, you remember already sensing warning signs. The first way to reduce this, as above, is to write reasons before results. The second is not to edit sentences already written. If your view changed, do not delete the original; add a new sentence with the date. The third is to write reasons as numbers and conditions. A sentence saying the trend looked good can be interpreted any way later, but a sentence saying the daily close finished above the 20-day moving average for the third day leaves little room. The fourth is to preserve the scene as it was, for example with a screenshot. Hindsight does not disappear even then, but at least you can tell what you knew at the time from what you did not.

Observation journal: logging scenes you did not trade

If you write only on days you trade, the record tilts to one side. Only the scenes where you were moved enough to enter remain, and the scenes where you saw a similar signal and let it pass vanish. Later, looking back, you see not how things went overall when a signal appeared but only the subset you picked. So it helps to log scenes you only watched in the same format. Write what you saw, why you stayed out and how the chart moved afterward. These observation notes carry no real profit or loss, so they are less driven by emotion and let you look calmly at the reasoning alone. An observation journal is also practice in spotting signals. Logging each time a predefined condition appears on screen tells you, from records rather than gut feel, whether it appears more or less often than you thought and in which hours or market conditions it tends to show up. Note as well that a few weeks of records are far too small a sample to judge how a rule performs.

Checking with live tools

The chart state you write in a journal is best checked on the same screen with the same settings each time. This site's crypto multi-chart and stock multi-chart split several assets across one screen and let you choose bar length, moving averages, Bollinger Bands, volume and RSI(14) per pane, which makes it easy to copy the state with the same layout every time you log. The crypto and stock buy and sell signal tools show each indicator's rule and current value together, so you can write in the reasons field exactly which indicator had which value. Rather than writing the tool's signal grade itself as your reason, writing the indicator values and rules behind that grade makes later review easier. If you want to apply a rule you wrote down to past prices, the strategy backtesters let you compare decisions in your journal with how the rule did historically. You can keep the journal anywhere, but this site's notepad saves only in your own browser without sign-up, which makes starting a simple journal low effort.

Common mistakes

First, treating the journal as a ledger of profits. A journal with only profit and loss figures does not tell you what to fix. Second, writing winning trades in detail and skimming over losing ones. A record skewed this way makes your decisions look better than they were when you look back. Third, filling in reasons after the result is known. Reasons written that way get polished to fit the outcome, so they become explanation rather than record. Fourth, concluding from a handful of results that a method works or does not. A small number of results swings heavily with chance, so judging mainly by whether the reasoning was confirmed is better. Fifth, using the journal to show or brag to others. Once it is a record others will see, you will want to leave out unflattering scenes or polish the reasons. A journal is most honest when only you read it. Sixth, wanting to perfect the format before starting. Starting with a few fields and adding ones you need as you review lasts longer.

How crypto and stocks look different

Crypto and stocks open in different ways, so what to note in a journal differs a little too. Crypto trades around the clock, so a date alone does not tell you where a day breaks. Decide whether to log in Korea time or UTC, and note at the start that the daily bar's reference time can differ by exchange. Even for the same coin, price and volume differ across exchanges, so which exchange's chart you watched matters. For futures, the leverage ratio and funding settlement times also belong in the fields. Stocks have a regular session, so the start and end of a day are clear. In Korea, even heavily traded stocks such as Samsung Electronics and SK hynix can move differently near the open and close than during the session, so note which part of the day the scene came from. If it was a price seen during Nextrade alternative venue hours, record that too. For US stocks, even indices and large tech names can trade at prices outside regular hours that differ from regular-session prices, so marking whether you saw pre-market or after-market prices avoids confusion later.

• Crypto: settle on one recording basis, Korea time or UTC
• Crypto: note the exchange and, for futures, leverage and funding settlement times
• Korean stocks: note whether it was the regular session or after-hours and alternative venue hours
• US stocks: mark whether a price was regular session, pre-market or after-market

On a live chart

The most common mistake when journaling from a live chart is writing up a forming bar as if it were closed. The last bar has not closed yet, so a moving average cross or band break seen during updates can disappear when the bar closes. In the reasons field, therefore, note whether the signal was seen on a forming bar or confirmed on a closed one. If you decided on a forming bar, that fact itself is something to review. Looking at the same scene again later on closed bars, you can confirm from records how often signals seen during formation changed. If you use alerts, also note when an alert fired, the price at that time and what you did after seeing it. A live screen changes every few seconds, so memory blurs especially fast, and taking a screenshot at the moment of decision helps. Keeping the rule that the result field is filled only after the reference bar closes keeps the swings of the live screen from leaking into the record.

A practical checklist

A journal becomes useful when kept consistently, so it helps to fix the order of writing and follow it every time. A fixed order reduces the habit of looking at the result first and filling in reasons afterward. The list below is about what to write and check; it does not say what to do if a given result appears. At first it is fine not to fill every field, and on busy days a one-line reason and a screenshot are enough. Keeping just two rules, reasons first and results later, changes how useful the journal is. On weekends, read the week's entries from the start, mark the scenes where the reasoning was confirmed and where it was not, and briefly note whether the same mistake repeated. If the review turns up something to fix, copy it as one line to the top of next week's journal so it catches your eye every time you write.

• Before entering or observing, write date, asset, exchange, bar length and chart state
• Write the grounds for the decision and the condition that would prove them wrong, in numbers
• Mark whether the signal was seen on a forming bar or a closed bar
• After the reference bar closes, write the result in a field separate from the reasons
• Do not edit sentences already written; add to them with a date
• On weekends, review separately whether the reasoning was confirmed and how the result turned out

Limits and disclaimer

A trading journal only helps you review decisions; it does not guarantee the next one will be right. However long you keep records, the market can move in ways your records never showed, and weeks or months of entries are often too small a sample to judge how a method performs. A journal means something only when written honestly; used to show others or to prove profits, the record is easily embellished. The bar closing times in this article are based on exchanges that split bars on UTC and on the Korean and US regular sessions, and they can differ by exchange, charting program and daylight saving time. This article explains a record-keeping habit and does not recommend any asset or trading method. Trading decisions and their results are your own, and in leveraged trading a single short move can trigger forced liquidation.