When the parabolic curve moves towards vertical it sets the maximum date for the end of the trend.

当此抛物线运行到接近垂直状态时，它就到达了趋势结束的最后期限。

youdao

When the parabolic curve moves towards vertical it sets the maximum date for the end of the trend.

当此抛物线运行到接近垂直状态时，它就到达了趋势结束的最后期限。

youdao