BCH is just another altcoin, but the marketing was really top notch. Making a big news fuzz by "copying/splitting" the BTC chain. The attention it got drove the prices. I think it'll fall some more when people realize they can't do anything more or less with an allready established altcoin.
i thinks its falling now since btc value were into increasing at this day up to this moment, It will try to get btc users but it will never win since users already trust btc that's why even bcc is there it keeps on price increase.