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交易者常常简单地根据自己拥有的资金来考虑头寸规模，但真正的细微之处在于考虑波动性和您选择的止损。例如，如果您正在关注 $DAX 的多头头寸，并且您的技术分析表明合理的止损需要距离150点，那么这150点代表您的每股风险或每份合约风险。现在，如果您的该笔交易的总账户风险是您投资组合的1%，那么您只需将该美元金额除以您的每股150点风险，即可确定您的最大头寸规模。这与 $DAX 可能移动多少份合约无关，而是与您根据预设的每笔交易风险能承受多少损失有关。这可以保护您，即使方向判断正确，也不会因为对波动性工具过度杠杆化而被清仓。
จริงเลยครับ! หลายคนชอบมองแค่ขนาดพอร์ต แต่เรื่อง Volatility กับ Stop-loss นี่แหละคือจุดสำคัญที่ทำให้การคำนวณ Position Size แม่นยำขึ้นเยอะ
This is a great point, especially for those new to trading. It's not just about the money in your account, but how much of that money you're willing to put at risk on any single trade, taking into account how much the market itself is moving.
This is such a crucial point that often gets overlooked, especially by newer traders. Factoring in volatility and a realistic stop-loss before determining position size makes so much more sense than just going by a percentage of your total account. It's like building the house from the foundation up.
It's a good point about not just looking at the account balance. However, even with volatility and stop-loss factored in, many still struggle to define their 'total account risk' in a way that truly protects against a series of losing trades.
This is a crucial point many new traders miss. Beyond volatility and stop-loss, it's also worth considering how a string of losses at your maximum position size could impact your mental capital and ability to stick to your plan.
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