I don't see my APEX account in NinjaTrader, I only see my SIM account
Please make sure you entered your Apex license key in Ninja Trader if you don't have your own paid license key.
Your key was sent to you by email, you can also find it in your ApexTraderFunding account under "Step 1 Rithmic and Step 2 Ninja Trader Setup and Key".
Copy your key and paste it under: Ninja Trader Control Center - Help- License Key.
Close Ninja and re-open,