How can I trade multiple accounts at one time?
All accounts must be under the same Rithmic user ID.
You can trade multiple accounts at the same time with this tool: https://apexinvesting.com/ninjatrader-8-trade-copier-for-multiple-accounts/
Note: If you have a self-funded account with Ninja and you use your own NinjaTrader Key, you can trade Apex Trader Funding and your own account at the same time. (Multi broker is not required for this.)