I think it should be margin trading rather than futures. Because the Bitcoin dominance index is not a commodity and it is really difficult to give an accurate index on the exchange. so trading like that would be insecure and the chances of us losing more. Actually we have to follow the house rules but I don't support this kind of bitcoin dominance.
Edited in the OP, it's a perpetual contract:
We're pleased to announce the following updates to the Derivatives Product Description.
The Product Description now includes the BTCDOMF0:USTF0 (Bitcoin Dominance) product. The Bitcoin Dominance product tracks the change in price of BTC relative to a basket of seven Digital Tokens (ETH, EOS, LTC, XRP, BCH, XTZ and XLM).