to my knowledge Etereum follow the price of Bitcoin if I think Ethereum can not be separated from the influence of Bitcoin because Ethereum like silver and Bitcoin like gold.
Now bitcoin still has a large price dominance over the rest of the crypto currency. This is due to the fact that bitcoin has a very high level of capitalization compared to the total capitalization of the crypto currency. If bitcoin capitalization falls to a general level, then it will lose its dominance and will no longer dictate its price line of behavior in the market to the rest of the crypto currency.