https://imgur.com/a/vd9v5GY – SPX from 2021-2022
https://imgur.com/a/w2NIJ1O – SPX from 2018-2019
https://imgur.com/a/sxH6qdM – SPX from 2008-2009
https://imgur.com/a/opFrQnG – TSLA in 2022
https://imgur.com/a/9tFt2NZ – FB from 2021-2022
https://imgur.com/a/tKvten3 – AAPL in 2000
These are just some examples. It’s not perfect obviously, but there seems to be more than zero correlation here.
You can play with the indicator yourself on Tradingview. It’s called Moon Phases (I’ve changed the colors, the default colors set the new moon to white and the full moon to gray, which is confusing)
(This is not financial advice. This is mostly for fun.)