I just generally track the shitcoins, mainly ETH, relative to BTC. When there is high directional correlation, but an outperformance of shitcoins to BTC, I assume it’s traders getting leverage to trade the whole cRyPtO market, but moving the largest market cap less. Then I look back to see what that started. This makes even more sense as there is only a Bitcoin ETF stimulating demand for one asset. The coattail riding isn’t coming from ETF buyers.
It’s very scientific, and you should base your financial decisions on my analysis.