It makes sense HEX would at least retake previous ATH's and possible surpass by it a certain margin before falling off once the fork takes place. I believe the ratio of value between ehex and phex post fork will be 20% / 80%. Thus, ehex may fall back down to $0.20 -> $0.37 while phex will be over $1.00.
Also I believe BTC and ETH are in for a major correction. And historically since the inception of the existence of HEX, HEX has been inversely correlated (not "decorrelated") to the predominant trend in BTC and ETH. These confluence of variables, BTC and ETH charts looking bearish for the next couple of months, Pulsechain launch coming around February, and the fact that the chart of HEX having completed a 71% correction with confirmations of many factors pointing to the notion the bottom is in, lead me to believe HEX is poised to rise again.