NO.PZ2020012001000010
问题如下：
What is the difference between a scalper and a day trader?
选项：
解释：
Both take positions and close them out during the same day. A scalper is looking for very short-term trends in futures prices and often keeps a position open for only a few minutes. A day trader keeps the position open longer.
Both take positions and close them out during the same day.能解释下这句话吗？谢谢。
