Exactly Adamus. If you want to connect IB With Ninja just have a look at the following official guide. Maybe you already have it
http://www.ninjatrader.com/webnew/support_interactivebrokers.htm
I'm recommending to configure API in IB before (as indicated in the guide) :)
You will be able to...
I can state NJT can use IB as datafeed. See here
http://www.ninjatrader.com/webnew/trading_software_brokers_data.htm
I've been using it sing 4 years and I woul NOT change it with anyone else platform. For me is the best I've ever found
kind regards