Altcoin will be down, if bitcoin goes up.
Altcoin will certainly go up, if bitcoin goes down.
Altcoin will stay or even going up if bitcoin is being stable.
You see whales take advantages of this.
When btc goes up, they trade to fiat.
when btc goes down, they trade to btc again and pump altcoin and take profit.
and if this is happening, we can try to follow the whales to take the advantages and make a profit for our self. and if we can get a sign from the exchange, I think we have our time to buy and sell the coin and not just buy and sell bitcoin but we can do with altcoin too. I think so far, we have our chance to see this but sometimes we are missing the right time to enter the market so we cannot make a profit but we can do this for another time.