the worst part about a DEX is that its limited to a specific blockchain which doesn't allow for easy trade to get a different crypto coin...guess too many limitations to be used.
The poorly designed ones are like this. Have you given Block DX (powered by Blocknet Protocol) a try? It can trade over 100 different assets from different blockchains and trades are independent of the Blocknet blockchain. Trade time is also independent of the blockchain's block time, but trade finality is still reached on that blockchain. Unlike other suggestions here such a Bitshares, Block DX doesn't use proxy tokens or colored coins. The native assets are traded and funds remain in the user's control throughout the entire process of the trade. Unlike Komodo, you can use your own Qt wallet for verification checks instead Electrum servers. Every component of the exchange is decentralized, including capital storage (your own wallet), order books (compiled locally), order matching (p2p), and settlement (atomic swaps).
You can see a list of compatible assets for trading here:
https://docs.blocknet.co/blockdx/listings/#listed-digital-assets