Of course the price of any altcoin depends on the price of bitcoin and ethereum.
This is clearly visible on any price chart. especially when there is such a high volatility on the market.
The price chart of a coin is very similar to each other.
Watch what you're saying there. Not technically all the time. Then it means Bitcoin and ETH could've been drowned down below the top 50 coins in CMC if you believe that altcoins follow up in its price. You know that there are a lot of coins to invest in there and saying that they really follow these two doesn't just make any sense at all. There is a big difference between the two although occasionally the trends is what altcoin follows. It is becoming of an image that they follow Bitcoin and ETH due to them being crypto coins.