I didn't post about the Profitwalla version, but I did try that NT version with whatever default key it comes with, and a CQG live account connection to Amp was established. The @AMP key reference from those instructions is from years ago, when that was the requirement, based on the then Ninjatrader requirements. And it was likely at the time when new users who establish Amp as their brokerage, were allowed to choose NT as their charting package to trade with. But today, Amp does not offer NT any longer, because NT Corp does not allow them to, ever since they created their own brokerage. So, any default key should work, and you will be able to trade a live account you have at Amp. Here's the (default) one I use: