made a quick script to compare r2 correlation coefficient, can change source and correlation component in inputs menu
example, here we can see that btc currently has a 0.85 correlation with eth vs usd when using simple moving avg on the daily (above 0.8 is positive correlation. below -0.8 is negitive correlation, and anything in between means there is no correlation)
note: if you wanted to compare with a different source like rsi, then you would need to reduce the length in the inputs menu
not an expert, i encourage doing your own research
biffy