问题如下：
Which of the following is not an assumption of technical analysis?
选项：
A.Security markets are efficient.
B.The security under analysis is freely traded.
C.Market trends and patterns tend to repeat themselves.
解释：
A is correct.
Technical analysis works because markets are not efficient and rational and because human beings tend to behave similarly in similar circumstances. The result is market trends and patterns that repeat themselves and are somewhat predictable.
这个讲义里，没有提到 B 选项也是一个假设啊
