So far we don't offer any support to build directly in Ninja Trader while we offer the EasyLanguage codes to use in Multicharts or Tradestation. I don't know how skilled you are in programming your own stuff in Ninja so I can't tell how difficult it would be to reproduce the lessons on your platform.
I think in the future we will also offer the functions we use in C# so that Ninja user can take direct advantage of these.
Trading Systems Supremacy shows the development process I follow and offers some examples on futures and forex, all you need is the capability to reprogram that into Ninja and run tests there and then develop new ideas based on what you learn and possibly discuss these ideas with me and other students in the forum we are registered to.
See also the videos: