Trading Psychology · Lesson 9 · Beginner
Position Sizing from a Psychological View
You understand that a small position keeps you calm and your decisions clean.
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Size and Calm
Position size follows from account risk and stop distance, never from leverage. A small size keeps you calm: when the maximum loss does not matter, System 2 acts instead of panic.
Set account, entry and stop at 1 percent risk and read off your position size in USDT.
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Test yourself
Why does a smaller position help your psychology?
- The loss hurts less, you stay calm and rule-compliant
- It makes more profit per trade
What determines the position size?
- The leverage
- Account risk divided by stop distance
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The key points at a glance
- The stop determines the size, never the leverage.
- Small size keeps you calm and clearly focused.
- Survival first: 0.5 to 1 percent risk per trade.
Deep dive
Why small positions keep your thinking clean
Schwager sums up many Market Wizards in one sentence: the position has to stay small enough that fear does not control your judgment. As soon as the loss puts you on alert, the fast, fear-driven system takes over.
Larry Hite never risks more than 1 percent per trade, which is why every single trade is a matter of indifference to him. That indifference is engineered and the reason his rules hold up under pressure.
The stop determines the size, never the leverage
Kovner names the correct order: the position size is determined by the stop. Leverage only finances the margin. First set the stop where it makes technical sense, then derive the size from the distance and your fixed account risk.
- Stop behind a real barrier, not at the obvious high or low
- If the sensible stop is far away, use fewer contracts rather than a tighter stop
- 0.5 to 1 percent account risk per trade, always relative to your current capital
- Kovner's colleague doubled up twice a year and ended at zero: a greedy trader always blows out
How to find your calm size
Before the trade, say the maximum loss out loud in USDT and in percent. Choose a size where that amount is fully acceptable emotionally. If you get queasy, the position is too big, no matter what the math says.
Sources: Elder, Schwager, Goodman, Taleb
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