Trading Psychology: FOMO, Loss Aversion and Routines

Before you read: Trading Plans, Journaling and Honest Backtesting

What you will learn

• Common thinking patterns that affect trading decisions: fear of missing out, loss aversion, revenge trading and overconfidence.
• Why these patterns are normal human tendencies rather than personal failings.
• How routines, written rules and breaks are used by some traders to notice these patterns sooner.

Why does psychology come up in trading at all?

If you knew exactly what to do, why might you still not do it?

Trading puts money, uncertainty and speed together. Decisions are made under time pressure, outcomes are partly random, and feedback is immediate and emotional. In those conditions, ordinary human tendencies show up clearly. Behavioral finance research has described many of them. This lesson names a few, describes how they can appear, and outlines habits some traders use to notice them. It is educational, not medical or psychological advice.

What is fear of missing out (FOMO)?

When a market moves without you, what does the urge to jump in feel like, and what does it skip?

FOMO is the pressure to act because others seem to be profiting or because a move is underway without you. It can lead to acting outside a plan, at prices that were not part of any preparation, often after much of a move has already happened.

How it can appear:

• entering because a chart “looks like it is leaving”,
• abandoning preparation after seeing others post gains online, or
• increasing size to “make up” for a missed move.

What is loss aversion?

Does losing $100 feel the same as gaining $100?

Loss aversion describes the tendency for losses to feel more painful than equal-sized gains feel good. It is one of the best-known findings in behavioral economics, described in Daniel Kahneman and Amos Tversky’s 1979 paper on prospect theory. In trading, it can show up as:

• holding a losing position longer than planned, hoping it returns to break-even,
• moving a planned exit further away to avoid taking the loss, or
• closing winning positions very quickly to “lock in” a gain.

Researchers call the tendency to sell winners too soon and hold losers too long the disposition effect. The result can be a pattern of small gains and larger losses, the opposite of what most plans intend.

What is revenge trading?

After a loss, is the next decision about the market, or about the loss?

Revenge trading means trading to win back a recent loss rather than because the plan’s conditions are present. It often comes with larger size, faster decisions and less preparation. Because it is driven by the previous outcome rather than current conditions, it can turn one loss into a sequence.

What is overconfidence in trading?

After a run of good results, how would you tell skill from luck?

Overconfidence is overestimating one’s knowledge, skill or control. A few good outcomes can feel like proof, even though short runs of results are strongly affected by chance. Related tendencies include:

• confirmation bias: noticing evidence that supports a view and discounting evidence against it,
• hindsight bias: feeling, after the fact, that an outcome was obvious, and
• recency bias: giving the last few results more weight than the longer record.

Overconfidence can show up as larger positions, trading more often, or dropping the parts of a plan that seemed unnecessary while things were going well. One study of brokerage households (Barber and Odean, 2000) argued that overconfidence helps explain why some individual investors trade often and do worse as a result.

How do some traders use routines and structure?

What could you decide in advance, while calm, so you do not have to decide it in the moment?

Some traders use structure to reduce how much is decided in the heat of the moment. Common elements:

• A preparation routine before each session: review levels, the economic calendar and the plan (trading plans).
• Written conditions for acting, so a decision can be checked against something other than feeling.
• Stopping rules, such as ending the session after a set number of trades or a set planned loss.
• Breaks after any trade that produced a strong emotional reaction, whether a win or a loss.
• Journaling mood and circumstances alongside each decision, so patterns become visible over weeks rather than in the moment.
• Sleep, food and fatigue awareness: fatigue and hunger can affect decisions in many areas of life, including trading.

None of these removes emotion. They make it easier to notice when emotion, rather than the plan, is making the decision.

Routine diagram

Illustrative diagram constructed for teaching. Not real market data.

The diagram shows one example of a routine loop: preparing, acting only on written conditions, pausing, and reviewing in a journal before the next session. The specific boxes matter less than the idea behind them: each step is written down in advance, so a decision made in the moment can be compared with the plan afterwards.

What about wellbeing?

If trading is affecting your sleep, relationships or finances, what would you tell a friend in the same place?

Trading can be stressful, and losses can affect mood, sleep, relationships and finances. If trading is causing you distress or you feel unable to stop, it is a good idea to pause and seek support from people you trust or from a qualified professional. These lessons do not offer medical, psychological or therapeutic advice.

What this does not tell you about trading psychology

• How any individual should manage their emotions.
• That following a routine will improve results.
• Whether trading suits any particular person.

Check yourself

Reflect on these; there is no score.

1. Describe a time you acted because something was “getting away”. What did you skip? Hint: preparation or plan.
2. How might loss aversion change where a planned exit ends up? Hint: moving it further away.
3. After three good trades in a row, what question could you ask before increasing size? Hint: skill or chance.
4. Which one routine from the list would you find hardest to keep, and why? Hint: there is no right answer.

Last reviewed November 8, 2026. Spotted a mistake? Report an error.