We have been involved in discussions with NinjaTrader about the availability of their platform for The Gauntlet™ / Gauntlet Mini™, as well as for our traders who get funded by Helios Trading Partners. We hope to have a direct relationship with NinjaTrader that will provide a stable license to our users in the near future.
If you are the owner of a multibroker lifetime NT License that was purchased before July 2014, you will be able to use your platform for your LiveSim account and your Helios account.
Helios has now added a Leader-Follower service that will allow you to use NinjaTrader on your live account even if you don't have the type of license mentioned above as long as it supports the generic Rithmic Paper Trading. The system will copy your trades from NinjaTrader to Helios through a paper trading account. This means you're not interacting directly with the live market so there could be a small delay and you may not get the same fill. Traders who choose this option are responsible for monitoring their Helios account, since their loss limits are based on the Helios account, not the paper trading account. There's also an additional $25 ($50 if your user is more than 6 months old) data fee to maintain the paper trading account.