正在读一片文章，它描述如何查找时间序列数据中的极端值。说：

extreme values are defined as those whose (log) change compared with both adjacent months is greater than 3.5 standard errors of the (log) differenced series.

比如，我现有一年的股市日指数数据，如果根据他的描述寻找极端值？多谢。