Anybody help me too?
I suppose you cannot trade assets via
https://wallet.mynxt.infoSo you have to use secureAE (link on first page) or install nxt-client locally on your computer
http://nxtra.org/nxt-wallet/ (first time takes little longer when you upload the blockchain)
That's correct. secureAE is the quickest way or the nxt-client. Mynxt is just for charting purposes.