首帖 — 好奇每笔交易的风险和最大回撤

That's a great question, and something I've been wondering about myself. It seems like the 1-2% rule is a good starting point, but the drawdown aspect makes it trickier. Do you then re-calculate your 1% based on the new, lower account balance after a few losses?

You're spot on to think about the interplay between risk per trade and max drawdown. Many traders do dynamically adjust their position size downwards after a significant drawdown, effectively reducing their 1% risk to a smaller percentage of their current, reduced capital base to protect against further losses.

เรื่อง drawdown สูงสุดมันก็เป็นส่วนนึงที่ต้องคิดนะ แต่ถ้าคิด 1-2% ต่อเทรดนี่มันก็มาจากเรื่อง drawdown เป็นหลักอยู่แล้วแหละ ไม่งั้นก็ลงหนักกว่านี้ได้

Good question. Some traders use a fixed dollar amount for risk per trade, not a percentage, to avoid that issue of decreasing capital. Others only adjust after a certain percentage drawdown is hit.