US500 Historical Rallies & Pullbacks with a Potential Projection

I’ve observed the US500’s performance over the years, marking rallies with a blue line and pullbacks with a yellow line. Looking at the chart, a systematic repetition of these movements emerges, which, at first glance, seems to follow a recognizable pattern.
Specifically, I’ve cloned the blue line from the rally that started on 03/23/2020 and ended on 12/20/2021, now represented by a green line, to hypothesize a potential future rally. This clone is based on the duration of previous pullbacks:
The first pullback, before the 2020 rally, began on 02/20/2020 and ended on 03/23/2020.

The second pullback, the current one, started on 02/17/2025 and might conclude around 04/07/2025, potentially paving the way for a new rally.

the angle of those pullbacks is almost identic

This "snapshot" observation suggests we could be nearing a turning point. Of course, this is just a hypothesis based on historical patterns, and I encourage cross-referencing it with other indicators or analyses. What are your thoughts?