We have confirmed listing and trading on EtherDelta where MGX will be paired with Ethereum. You can find the link here
https://etherdelta.com/#MGX-ETH
As questions about listing and where will MGX be traded. We are still working on getting listed on other exchanges, as of the writing of this post, we have confirmed listing on Cryptopia and EtherDelta. The MEGAX Team is actively working on getting listed on more exchanges!