Funny people asking about Polo when they have frozen withdrawals for "security reasons" - check the troll box. I have one that I made to test it out yesterday and it has been stuck like that for nearly 30 hours. Hope they aren't about to do a GOX. Will be a disaster for all of crypto but it is all the more reason not go on there or to use it. One good thing would be more people using DEXs. As soon as I can get my money off Polo I am not using them again.
If you want to try an other exchange, try
www.tuxexchange.comThey have the fastest system of all exchanges, the more trades the faster it operates

I have known the staff for a long time and seen interviews they did, they are really the honest people I have met in the cyrpto community.
DEX is from DECENTRALIZED EXCHANGE why we need another exchage to grow and rate when Waves platform already have a DEX , wait for final realese and you will see how fast can be