https://forum.ninjatrader.com/forum/ninjatrader-7/platform-technical-support/22815-symbol-mapping-for-ose?view=thread
Symbol mapping for OSE - NinjaTrader Support Forum
General platform technical support for NinjaTrader 7.
symbol mappingoseninjatradersupportforum
https://support.ardensoftware.com/support/solutions/articles/101000496501-symbol-mapping-setup
Symbol Mapping Setup : Arden Software Support Hub
symbol mappingsoftware supportsetupardenhub