เกี่ยวกับการกำหนดขนาดสถานะเทียบกับ 'เงินที่ยอมเสียได้' สำหรับมือใหม่

That's a really good point. "Afford to lose" often gets conflated with proper position sizing. While the former is about not blowing up your life, the latter is about optimizing for growth within a statistical edge. They're related, but definitely not the same thing in terms of how you calculate risk per trade.

That's a really good question about translating 'afford to lose' into a systematic % of capital. I think the 'afford to lose' part is more about your overall trading capital rather than per trade, and then within that, you apply your fixed percentage risk per trade. What are your thoughts on that distinction?

The 'afford to lose' mantra feels a bit like telling someone learning to drive to only practice on cars they're okay with totaling. Good for the nerves, perhaps less so for the precision of the mechanics.