Imagine two traders on the same Tuesday morning.
Trader A follows their plan exactly: a valid setup, 1% risk, stop-loss in place. The trade loses. They close the platform feeling like a failure.
Trader B is bored, sees a big move, jumps in without a setup, doubles their normal size and has no stop. The market bounces their way and they make three times their usual daily target. They feel brilliant.
Who had the better day?
On P&L, Trader B. On process, it’s not close: Trader A did their job, and Trader B got lucky doing something that, repeated often enough, will blow up their account. This page is about learning to see your trading the way Trader A should see theirs.
(Both traders are hypothetical examples.)
Why your P&L is a bad judge of a single trade
Trading outcomes are a mix of skill and randomness. Even a strategy with a genuine edge loses a lot of individual trades, and a terrible decision can win by chance. Over one trade, one day or even one week, luck can easily outweigh skill.
The problem is that our brains don’t naturally separate the two. Psychologists call this outcome bias: judging the quality of a decision by how it turned out, rather than by how good it was when you made it. In a well-known set of studies, people rated the same decision as better when they were told it had turned out well, even though they had exactly the same information either way (Baron & Hershey, 1988).
In trading, outcome bias causes three expensive problems:
- You abandon good rules after normal losses. Three losing trades in a row feels like “the strategy’s broken”, even if it’s well within what you’d expect.
- You get rewarded for bad habits. Trader B’s lucky win quietly teaches them that stops are optional and size doesn’t matter.
- Your mood swings with every trade. Research on day traders found that those with more intense emotional reactions to gains and losses performed significantly worse (Lo, Repin & Steenbarger, 2005). That’s an association, not proof of cause and effect, but it fits what most traders experience: big emotional swings lead to impulsive decisions.
The four kinds of trade
Instead of asking “did I win?”, ask two questions: did I follow my rules? and did it win or lose? That gives four boxes.
| Won | Lost | |
|---|---|---|
| Followed my rules | ✅ Earned win | 👍 Good loss |
| Broke my rules | ⚠️ Dangerous win | ❌ Costly lesson |
✅ Earned win. The best feeling in trading. You did your job and the market paid you this time. Enjoy it, but don’t let it change your size or your rules.
👍 Good loss. This is the one beginners struggle with. If you followed a tested plan with sensible risk, a loss is a normal cost of doing business, like a shop paying rent. There’s nothing to fix. You log it and move on.
⚠️ Dangerous win. You broke a rule and got paid. This is arguably the most harmful trade you can take, because it feels like a success. Treat it exactly like a mistake: log the rule break and ask why it happened.
❌ Costly lesson. You broke your rules and lost. This should feel the worst, not because of the money, but because it was avoidable. It’s also the most useful trade to study.
Your goal over time is to move trades out of the bottom row. The columns, win or lose, are partly out of your control. The rows are entirely in your control.
What “process” actually means
“Trust the process” is meaningless unless your process is written down. Your process is the set of decisions you control:
- Preparation: checking the economic calendar, marking levels, knowing your plan for the day.
- Selection: only taking trades that match a written setup (for example, the rules in our moving average pullback strategy).
- Risk: position size calculated from your stop, with a fixed percentage risked per trade.
- Execution: entering where you planned, placing your stop immediately, never widening it.
- Management: following your exit rules instead of grabbing early profits or hoping on losers.
- Limits: stopping at your daily loss limit or maximum number of trades.
- Review: logging every trade honestly.
None of these depend on the market. You can score 100% on all of them on a losing day.
Important: process thinking only works if the process itself is sound. If you’ve never tested your strategy, “following the process” might just mean consistently following a losing method. Backtest and demo-test first. See how a trade makes or loses money and our strategy library for testable rule sets.
Exercise 1: Rescore your last 20 trades
Get your journal, or your platform’s trade history, and go through your last 20 trades (or as many as you have).
- For each trade, write Y if you followed every rule and N if you broke any rule. Be strict: entered early, moved a stop, oversized, traded outside your hours, or took a trade with no setup all count as N.
- Put each trade in one of the four boxes.
- Add up the P&L for each box separately.
Many traders find something uncomfortable: the “followed rules” trades are roughly break-even or better, and most of the damage sits in the “broke rules” row. That isn’t guaranteed, and your numbers may look different, but whatever you find is useful information. If your rule-following trades lose money too, that’s a strategy problem rather than a psychology problem, and you need to go back to testing.
Exercise 2: The process scorecard
At the end of each session, score yourself out of 10 using this card. P&L doesn’t appear anywhere on it.
| Process item | Points |
|---|---|
| Did my pre-session routine (calendar, levels, plan) | 1 |
| Every trade matched a written setup | 2 |
| Correct position size on every trade | 2 |
| Stop placed at entry and never widened | 2 |
| Followed my exit rules | 1 |
| Respected my daily loss / trade limits | 1 |
| Logged every trade, with notes | 1 |
| Total | /10 |
Track the score on a simple chart next to your P&L. A good week is one where the process score is high, whatever the P&L says. Many traders find that a run of 9s and 10s is more satisfying, and more motivating, than a lucky green day.
Exercise 3: Reframe the language
The words you use shape how you feel. Try swapping these out in your journal and in your head:
| Instead of… | Try… |
|---|---|
| “I lost £50 today.” | “I paid £50 in normal business costs while following my plan.” (only if you did!) |
| “That trade was a winner.” | “That was an earned win” or “That was a dangerous win.” |
| “Bad day.” | “9/10 process day, red P&L.” |
| “I need to make it back.” | “My next trade is the same as any other trade.” |
This isn’t about pretending losses don’t hurt. It’s about putting the attention on the part you control.
But don’t profits matter?
Of course they do. You trade to make money, and a prop firm only pays out on profits. Process thinking isn’t about ignoring results. It’s about judging them over the right timescale:
- Single trades and single days: judge on process only.
- Weekly: process score first, P&L second.
- Every 50–100 trades: now look properly at results. Is the strategy performing roughly as your backtest suggested? Are losses bigger than expected? This is the time to change your rules, using evidence, not in the middle of a losing day.
Changing your rules after every loss means you never collect enough data to know whether they work.
Checklist: Am I trading for process?
- [ ] My rules are written down and specific enough that someone else could follow them.
- [ ] I’ve tested the strategy (backtest and/or demo) before risking real money.
- [ ] I log a “rules followed? Y/N” column for every trade.
- [ ] I score each session on process before I look at P&L.
- [ ] I treat dangerous wins as mistakes, not successes.
- [ ] I only review or change my rules after a meaningful sample (e.g. 50+ trades), never mid-session.
- [ ] I can describe a losing trade as “good” without feeling I’m lying to myself.
Key takeaways
- One trade, one day or one week of P&L tells you very little about your skill. Outcome bias makes it feel like it does.
- Judge every trade on two questions: did I follow my rules, and did it win? Focus on the first.
- A rule-breaking win is a mistake. A rule-following loss is a cost of business.
- Process thinking only helps if your process has been tested. Discipline can’t rescue a losing strategy.
Frequently asked questions
Isn’t “trust the process” just an excuse for losing?
It can be, if the process isn’t tested or written down. That’s why we pair it with regular evidence-based reviews. Process thinking means judging decisions fairly in the short term and judging the strategy properly over a large sample.
How do I stop feeling bad about a good loss?
It usually gets easier with repetition and smaller size. If a normal loss feels painful, your position size may be too big for your comfort. Many traders find that thinking in “R” (multiples of the amount risked) instead of pounds helps too.
Does this apply to prop firm challenges?
Even more so. Challenges add targets and deadlines that push you to focus on results. See prop firm challenge pressure.
Related pages
- Next: Trading discipline: how to actually follow your rules
- Also: Revenge trading and tilt · Losing streaks · Psychology hub
- Course: Why most traders lose · Trading jargon
Disclaimer: This page is general education, not financial, investment, medical or mental-health advice or a personal recommendation, and it doesn’t take your circumstances into account. Examples are hypothetical, for illustration only, and not an invitation to buy or sell. Learning a strategy doesn’t guarantee profits. Past performance is not a reliable guide to future results. Futures, spread bets and CFDs are complex and carry a high risk of losing money quickly because of leverage, and most retail traders lose money. With a real futures account, losses can exceed your deposit. Prop firm challenges are paid evaluations: the fee is usually lost, and funded accounts are usually simulated. Only trade with money you can afford to lose, and speak to an independent FCA-authorised adviser if you’re unsure. The traders in the examples are hypothetical. Research is summarised in good faith with links to the original sources. Studies have limits and may not apply to you. If trading is affecting your wellbeing, the National Gambling Helpline (0808 8020 133) and Samaritans (116 123) are free and open 24/7. Read our full risk warning.