This is not a conventional chart. Nor would it be the scale when dealing with totally different prices.
It is so they can see the behavior by comparing the BTC against the BCH.
How for now they move on totally different paths.
What the BTC loses, the BCH wins and vice versa.
When the BTC supports pullback, the BCH makes resistance to retracement and vice versa.
To be attentive when they take any position.