I'm not sure if it's directly reverse (and it really hasn't been until the last week or so). I think BCH is still trying to figure itself out, and it's too hard to tell how it will ultimately correlate with Bitcoin.
But based on the chart, I do think that if you wanted to trade BCH, you should wait. Either Bitcoin will continue to increase, while BCH stays around $650, or BCH will continue to fall, while Bitcoin stabilizes after this run it's had.
I do think that BCH will likely see some runs in the future, especially when it becomes available to CB accounts in January. I wouldn't be surprised if BCH is in the four figures eventually.
Just my opinions...Others may beg to differ :)