Strategies in NinaTrader 8 are fully automated algorithms for the trading coded in NinjaScript/C#. MZpack API (Application Programming Interface) is an interface to MZpack Indicators that introduces traders to a programmable way of creating their own trading algorithms and automated strategies in NinjaTrader 8.
What you can do with a Indicators API/Strategies:
Find, backtest, and optimize an order flow/order book strategy