We were able to identify the following indicator in the NinjaTrader Ecosystem for this purpose. Clicking this link leads you to another website (the NinjaTrader Ecosystem) and the indicator is not provide by or supported by Base Camp Trading.
https://ninjatraderecosystem.com/user-app-share-download/ema-of-higher-timeframe
How Do I Add an EMA from a Secondary Timeframe in NT8?
Updated on April 13, 2021