https://blog.wongcw.com/2021/01/29/robinhood%e5%b0%87%e5%85%81%e8%a8%b1%e6%9c%89%e9%99%90%e8%b2%b7%e5%85%a5%e5%8f%97%e9%99%90%e8%82%a1%e7%a5%a8%e9%81%8a%e6%88%b2%e9%a9%9b%e7%ab%99%e3%80%81amc%e7%ad%89%e7%9b%a4%e5%be%8c%e9%a3%86/