When it comes to simulation platforms then there are lots but creating another one and tending to teach up some noobs then this wont really be a bad idea.
Site design isnt half bad either but as suggested it would be good if technical indicators or tools are complete like SL or TP's will be a good add up.
after you gathered enough suggestion, hope it will be available for public testing? I am seeing this to be game changer.
Game changer? Its just a simulation one unless if he would really consider on making it a live one.
I think adding many exchanges support is good fiche. Because users can get bast prices and making arbitrage.
This is a website that would have that exchange list for you to compare between exchangers.You can try to search up and you will find the difference between a simulation site and a exchange list with specific details.