Unit 3 · Level 2 · Environment design
Size until sleep is easy
Old Wall Street story: a worried investor asks how to stop losing sleep over his positions. The answer: 'sell down to the sleeping point.' The 1% rule from the Trading course is more than arithmetic; it's an emotion dial. At the right size, a red day is information. Too big, and the same red day is an emergency that summons every demon in League 1 at once.
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What you get asked
Account €20,000, risking 1% per trade. Entry €40, stop €36. How many shares can you buy?
1% of €20,000 = €200 of risk. Each share risks €40 − €36 = €4. €200 ÷ €4 = 50 shares. The formula from the Trading course, now doing psychology duty.
Match the position size to how a loss feels
Same market, same setup. The only variable is size, and it alone decides whether your brain can stay analytical or drops into panic mode.
You've checked the position five times tonight and can't sleep. What is that telling you?
Sleeplessness is your risk gauge redlining. It's the most honest position-sizing indicator you own, and it can't be sweet-talked.
The old Wall Street cure for worry: sell down to the ___ point.
If a position costs you sleep, it's too big for your nervous system, whatever the spreadsheet says. Trim until the worry stops.
Two traders take the identical trade. One is calm, one is panicking. What's the most likely difference?
Courage is cheaper than you think: it's mostly correct position sizing wearing a cape. Size is the one emotion dial you fully control. 🐜
The rest of this unit
Screens, size, sleep, and your circle: engineer the world that trades through you.