If you’ve been able to log in to your trading account, but the New Order button appears grayed out and inactive, it is likely you are logged in with read-only access.
Read-only access is a mode in which one can observe a trading account in real time, but all trading actions are disabled.
Quickly verify this is the case by looking in the Journal tab of your trading terminal for an entry that says “trading has been disabled - investor mode”.
If this message is shown, click File > Login to Trade Account and enter in your trading account password. The trading terminal will now show the New Order button as active and usable.
Otherwise, follow the link if you would like to change your trading account password and use that to log in to your trading account.