For the most part it appears that Bitcoin and Ethereum move inverse to each other. When Bitcoin pumps Ethereum dumps and vice versa.
When Bitcoin is slowly rising, Ethereum slowly declines
However there are some rare times when both assets move in concert with each other . It seems that during the early stages of a parabolic Bitcoin pump, Ethereum tags along for the ride.
We have just witnessed an awesome increase in Ethereums price against Bitcoin. However now that Bitcoin is on the move up Ethereum in its blow off phase is on the way down and is likely to remain that way until Crypto mania starts again .