There are some good videos

來源: 於 2025-08-31 20:03:27 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

Such as

https://youtu.be/mkqyaBYSgiY?si=hrZ58_VgltEvUhM5

Or you buy some subscriptions from your broker that has it. However, it is just the first step.