Trading Psychology · Lesson 3 · Beginner
Discipline as a Resource
You schedule your trading times so that decisions do not fall in phases of weak self-control.
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Discipline Runs Out
Ego depletion means: every act of willpower draws from a shared energy pool. When hungry, tired or after hard decisions, discipline collapses, and that is exactly when you blow through stops and make revenge trades.
Blow-up After the Streak
After a winning streak the mood is good and System 2 is weak. Risk is underestimated, the big loss often follows right after the best phase.
Set your trading window and your no-trade conditions.
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The key points at a glance
- Ego depletion: self-control draws from a shared energy pool and runs out.
- The big loss often comes after the best phase, because System 2 is weak then.
- Define hard no-trade conditions in advance.
Deep dive
Willpower is a tank that runs dry
In Israeli courts the approval rate of parole judges drops from around 65 percent right after a meal to near 0 percent just before one. Same judges, same files, only an empty tank of self-control.
After a long day at the screen, when hungry or tired, it is not your character that breaks, your resource is spent. In a good mood you think more superficially, which is why the blow-up often comes right after your best phase.
Why the big loss follows the winning streak
The most dangerous time is not after losses but after wins. Euphoria breeds a conviction in which no risk is perceived any more and the oversized position feels right. The pros act counter-cyclically against this.
- Paul Tudor Jones reduces size when he is trading badly.
- Marty Schwartz cuts down to a fifth or a tenth after a heavy loss.
- Ed Seykota: wanting to win it back is lethal.
- At new account highs, deliberately risk less, not more.
Discipline is a technique, not a talent
People are not born with self-discipline, it is the technique that steers attention back onto the goal. Make the important decisions in advance, while your System 2 is fresh: risk budget, stop and maximum daily loss before the first chart.
Leveraged crypto day trading acts like a random-reward machine that is addictive. A fixed cap on trades per day costs no self-control, it is simply there.
Sources: Kahneman, Douglas, Schwager, Taleb
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