You have four options:

1) Use the Sierra Chart plugin (beta) to connect to CQG.
https://www.zorro-trader.com/manual/en/sierra.htm

2) write your own plugin for ninja trader
https://www.zorro-trader.com/manual/en/brokerplugin.htm

3) pay someone to write the plugin for you

4) ask nicely for oP group to make it for free in the future features section and hope they put it on their to-do list.
https://opserver.de/ubb7/ubbthreads.php?ubb=postlist&Board=48&page=1