The European DAX index, and the technology weighted Nasdaq100 index, do show common periods of strength and weakness throughout the year.
The picture below shows the common strong and weak periods for the two markets. Left side is January 1., and right side is December 31. The horizontal line is the timeline for 2022, and shows where markets are at right now. The strong and weak time periods range from 11 to 43 calendar days before changing course.
The Blue fields show both markets have a tendancy to stay strong, the Pink fields show both markets have a tendancy to stay weak.

Horizontal Green line is updated after this article ( as of Sunday March 6th. 2022 ).
According to seasonality, both markets are now trading in a common weak phase since January 26. (Dax at 15.450 and Nasdaq100 at 14.160). The present weak period could last until March 23. for now (36 more Calendar days).
The model is Pink if DAX and or Nasdaq100 is weak, and Blue if both the DAX and the Nasdaq100 are strong.
Always do your own research before entering into any market positions.
2022-02-17 08:10 | Nasdaq100, Dax