How to Review Your Trades: A 15-Minute Post-Market Review Checklist

Live session 21 was a good day. Sam's one trade hit its target for +$29.14, and he sat down at 11:30 to review it feeling pleased with himself.

Forty minutes later he was still at it. He'd replayed the whole morning twice, read three posts about the stock and worked out how much more he'd have made if he'd held another 20 minutes. He was late for his shift.

That evening he opened his journal and found what the 40 minutes hadn't produced. No fill prices. No emotional rating. No change for tomorrow. He'd spent a lot of time looking back and still had nothing to carry forward.

In this lesson you'll learn what a post-market review is and why it works, why the decision gets graded before the result, a 15-minute checklist in four blocks, how to replay a trade without fooling yourself and how one daily review feeds the weekly one. If you haven't built a journal yet, start with Lesson 83: The Trading Journal, because the review runs on what the journal records.

A post-market review is a short, structured check of the day's trades against your written plan, done the same day, that ends with one decision for the next session.

Think of the debrief after a flight-training session. The instructor doesn't replay every second of the flight. They go over what was planned, what actually happened, why, and the one thing to practice next time. Then everyone goes home.

Your journal and your review do different jobs. The journal is the record: prices, setups, results and notes. The review is the thinking you do with that record. A full journal with no review is a filing cabinet nobody opens.

For Sam, the review sits in the 30 minutes between the end of his trading window at 11:30 and the start of his work shift at noon. That time limit is useful. It forces the review to be short, which is the only kind that survives past week two.

Reviewing your trades helps because structured debriefs reliably improve performance: a meta-analysis of 46 samples found that debriefs improved effectiveness by about 25% on average compared with control groups.

That meta-analysis, by Scott Tannenbaum and Christopher Cerasoli, covered 2,136 participants (Tannenbaum and Cerasoli). None of them were traders, but the finding transfers well, because a trading session is a performance like any other: a plan, an execution and a result.

Many debriefs borrow their template from the US Army's after-action review. A US Army Research Institute report describes it as a discussion that breaks one big question, "How did the unit do?", into three smaller ones: what happened, why did it happen, and how can performance improve (Morrison and Meliza). Those three questions are the backbone of the replay block in the checklist below.

You should grade each trade's decision separately from its result because outcomes are noisy, and people naturally judge a decision as better when it happens to turn out well.

Psychologists call this outcome bias. In a classic 1988 experiment, Jonathan Baron and John Hershey gave people medical decision cases that differed in whether the outcome was a success or a failure, and the decisions that turned out well were rated as better decisions, even by people who said outcomes shouldn't matter. A 2023 replication with 692 participants confirmed the effect (Aiyer et al.).

In trading, outcome bias does damage in both directions. It punishes good trades that lose, and it rewards bad trades that win. DayTradingToolkit simulated both, using the same trade model as Lessons 89 to 91: a rule-following trade with a true edge of +0.09R, and an assumed bad habit (such as chasing an extended entry) that averages −0.31R.

DayTradingToolkit simulation, seed 929292: 100,000 runs per row; the bad habit is an assumption, set 0.40R worse than a rule-following trade. Results come in lumps (a full win or a full stop), so the middle rows don't fall smoothly. All figures are hypothetical.

Read the first row slowly. A rule-following trade with a real edge loses more often than it wins, and a habit that costs you money pays you more than a third of the time. Even after 10 tries, a losing habit looks like a winner almost 3 times in 10.

That's why the review grades every trade on two separate questions: did you follow your plan, and what was the result? Together they put each trade in one of four boxes.

The box to watch hardest is bad process with a win. It feels like a success, so it's the one you're least likely to question. A broken rule that pays you is a bill that hasn't arrived yet.

A 15-minute post-market review has four blocks: record the facts, grade each trade, replay one trade and decide one change for tomorrow.

The go-back-to-paper triggers come from Lesson 89, and the experiment stop from Lesson 90.

The grading block uses six questions, starting with whether you ran your pre-market routine from Lesson 87. They take about 10 minutes on their own when you're new, and closer to five once they're a habit.

Two details make the blocks work.

Record before you judge. Write the facts first, while the numbers are on your screen. If your actual loss was bigger than planned, the difference is slippage and fees, and you can't measure what you didn't write down.

Decide exactly one thing. "No change" counts as a decision, and after a good-process loss it's usually the right one. Five changes at once means you'll never know which one helped.