理解头寸规模，而不仅仅是“账户的X%”

This is a great point. I always hear about the X% rule but linking it to the stop loss and potential reward makes so much more sense. How do you decide what's a good risk/reward ratio to even consider a trade?

Totally agree. Many focus on the percentage without considering the actual dollar risk relative to the potential reward, which is crucial for determining how much capital to allocate.