I watch this price action closely so I can spot divergences on BCH's next rally, they generally track in the opposite direction ₿TC is dominating but when BCH is building up for a rally the price action begins to diverge prematurely temporarily tracking ₿TC's rally upwards opening up an easy to spot entry point. When they begin to diverge back to opposite movements BCH stops its price mirroring of ₿TC setting up your BCH exit point.
Showing price tracking to Bitcoin dominance then the divergence setting up a Bitcoin Cash entry
Showing current price movement
All of this should be used with your typical momentum indicators but it is an effective tool to watch in tandem.