The official press release can be found here: https://blog.kraken.com/news/kraken-to-acquire-ninjatrader

Using our proprietary algorithm, the Super Heikin-Ashi Indicator is an enhanced Heikin-Ashi bar style. Unlike other versions of HA, it does not employ any smoothing by MA. The Super HA Indicator offers superior reversal reading and sustains trends for longer.