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新手常犯的一个错误是认为头寸规模仅仅是为了不爆仓。虽然这是最低限度，但有效的头寸规模管理是关于管理你每笔交易相对于你账户规模的风险，以及至关重要的止损点位。你计算出你愿意在单笔交易中接受的最大亏损金额，然后用这个金额除以你的止损美元价值（入场价减去止损价）。这会给你你可以交易的单位数量。例如，如果你风险承担100美元，止损距离为10美分，你可以交易1000个单位。你的入场价和止损价定义了你的风险，而不仅仅是账户的某个任意百分比。
This is a really helpful point. So, if I understand correctly, it's not just about what percentage of my account I'm risking, but also making sure that percentage is tied to where my stop-loss actually needs to be, not just some arbitrary number?
This is a great point. Many new traders gloss over the stop-loss placement part, which is absolutely critical for calculating the correct share size for a given risk percentage.
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