สับสนเรื่องการกำหนดขนาด Position กับความผันผวนที่ต่างกัน

That's a great question, and it highlights a common pitfall. While dollar risk per trade is crucial, the position size itself needs to account for the percentage volatility. Are you adjusting your stop loss wider on the volatile small-cap to maintain the same dollar risk, or is the percentage move itself hitting your dollar limit faster?

That's a great question and a common sticking point. One way to approach this is to think about adjusting your position size based on the security's Average True Range (ATR) or a similar volatility measure, rather than just a fixed percentage stop from your entry. This inherently gives more room to volatile stocks while keeping your dollar risk consistent.

This is a great question that I've also been wondering about! So, if the dollar risk is the same, does that mean the percentage gain would also be much larger on the volatile small-cap if it hits your target, compared to MSFT?