From Official web page FAQ:
Q: Will I get ECTV if I have ETH in my wallet on a digital exchange?
A: Unfortunately not. You must hold ETH in your personal wallet at the moment of the snapshot on January 11 in order to get free ECTV coins.
stex has tweeted about supporting the fork,
https://twitter.com/StexExchangeR/status/1082921947779002368 all three forks will be supported, so maybe we have nothing to wory about exchange.