Here are just two simple lines of resistance and support for btc dominance, if breaks support and btc price stays stable we can see a nice bounce in alts, opposite will happen if it pushes up to resistance line and breaks it. Eye on this along with Mcap and ETH.D if you are trading alts.
BTC D up + Mcap up = Good for all coins
BTC D up + Mcap down = Good for BTC but bad for alts
BTC D down + Mcap up = Very good for alts
BTC D down + Mcap down = Very bad for btc and alts
BTC D up + Mcap up = Good for all coins
BTC D up + Mcap down = Good for BTC but bad for alts
BTC D down + Mcap up = Very good for alts
BTC D down + Mcap down = Very bad for btc and alts