I still don't see any value for MDX tokens on
https://ethplorer.io Is it supposed to be so or the website works abnormally?
I guess it's because Midex is still not yet listed on coinmarketcap that's why we can't see the value. However, if you wanna keep track your midex holdings you can use Blockfolio app so you'll see what's the current price.
Stay tune as Midex team will launch the full version of the platform. Though there's still some minor bugs but it will be fix along the way.