Mid-December historically creates yearly tops and bottoms

Prior to every new month, I usually inspect price action on the same month but several years into the past. This gives me a rough idea on a potential volatility and seasonality. On the weekly chart, you can easily spot that all 2017, 2018 and 2020 were either extremes. 2017 and 2020 December created a new high, whereas 2018 created a bottom and set up a pace for further growth in the year after.

There is more to that. Let's inspect 4-hour charts of each year (Yellow - December, Blue - Mondays)





In all these years, the yearly extreme was created in mid-December. 2019 was nor top nor bottom of that year, but still made a monthly bottom on 18th. This looks like a pattern. Is there a top? The Short answer is - it might be.

For everything else, there is a fundamental catalyst to each month's look. Bitcoin probably follows Santa Claus's rally which is a stocks thing. But that is not enough to convince me that the chart which looks like this would suddenly reverse.



It can be a coincidence. And I honestly think, that it is. Still, it is worth sharing. I wonder what you think about this?