The market will be unstable, with a general downward tendency.

市场将不稳定， 总体呈下跌趋势。

We do not, however, merely mean by a cyclical movement that upward and downward tendencies, once started, do not persist for ever in the same direction but are ultimately reversed.

然而，我们所说的周期性运动并不仅仅意味着向上和向下的趋势一旦开始，就不会永远朝着同一方向持续，而是最终会逆转。