I thought, that Waves could only be traded on Bittrex. But now I found, that there are two additional exchanges: Liqui and Hitbtc. Both are very small and the trade volume is very low, but better than nothing . Here is the complete list:
Thanks for the link! Any idea if Poloniex or Kraken plan to add Waves too? Or aren't they interested because of DEX? In my opinion it's crucial for the success of Waves that they are listed at the large exchanges.