So i have to wait 20 blocks to let the buyer pay the btcs? why the exchange allow people to put buy orders without bitcoin? i dont understand, very bad exchange it needs improvement, orders should be executed instantly or in this case waiting maximum 1 confirmation in the blockchain..
The devs are working to make it better and if anyone can offer
realistic examples of improvements that can be implemented, let them know here or on Github.
Traditional exchanges are one of faster options for centralized XCP/BTC trading:
https://www.counterparty.co/xcp/ has a list.