我学习中碰到是这个句子：The position of these trend lines on this long-term weekly chart pattern is not exact but a sustained move above or below these lines shows a change in the behavior of the market.句子里面的其中一个动词"shows"是跟了哪个主语的，这个动词"shows"前是不是少了什么词，不知道这个shows指代的是什么主语，因为整个句子里面有 is, 和 shows等多个动词, 　能请各位帮我分析一下这个复杂长句子的语法结构和成分吗？非常感谢！

我爱翻译
The position of these trend lines on this long-term weekly chart pattern is not exact, but a sustained move above or below these lines shows a change in the behavior of the market.。
这是个并列句，由but连接，第一个分句主语是The position of these trend lines on this long-term weekly chart pattern ，第二个分句主语是a sustained move above or below these lines