I trade alts and btc at the same time. What I could recommend is trade them independently. Alternative coins have different charts as to bitcoin, they are not the same. Sometimes they correlate sometimes they don't. But more often based on my experience is that they can have direct and indirect relationship at all. At what cases?

If bitcoin keeps on going up while majority of alts are going down means there were just exchange of money inside the crypto space. People are just selling alts to buy bitcoin. Easy as that, in that scenario if you observe that too early, through the use of bitcoin dominance, you can keep reshorting alts as bitcoin keeps pumping.

This is just one part of the cycle of whats happening in the crypto market.

For now, I'm not convinced bullrun is starting yet. What I would like to see is a pumo for both Bitcoin and alts, because that just means new money is coming in in the market. This is what also drives the price in 2017, FOMO. New money coming in.