Why Position Size Matters More Than the Entry Price
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Risk control starts with how much you can lose if the idea is wrong. 本文会继续围绕搜索意图补充背景说明、操作步骤、对比维度和常见问题，方便读者快速判断重点并继续浏览相关专题。
Many beginners focus on finding the perfect entry. Experienced investors ask a different question first: if this idea fails, how much can I lose? Position size defines that answer before emotion takes over.
A smaller position gives room to think. It prevents one mistake from damaging the whole portfolio. Entry price matters, but it cannot fix oversized risk. Write the invalidation point and maximum loss before opening any trade.
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