Today is the best solution exchange IDEX
That's the most popular decentralized exchange now, but the volume has really gone down because the interest of ETH tokens has also dropped.
Currently, trading volume now is $1,753,150 USD but I hope a new competitor will operate in the market and will not only be limited for ETH and its tokens.
Last year there is huge volumes in Idex but due to decrease in the price of ETH and there are some fake coins listing there makes many people not showing interest towards index exchange. Still, it is generating very good volume in the market.