Advance Debug Panel is a mod that show ping , fps and status if you are lag or not.
This is really useful if you have uncooperative and slow ISP provider.
It will show fps, ping and lag status at the top corner of your World of Tanks client.
What good about this mod is that you can manually adjust fonts, color , background and add new ping and fps indicator if you like by using mouse on the screen.
Copy the mods folder into World_Of_Tanks installation folder .