All MZpack orderflow-based indicators have parameter to control amount of market data loaded for tick charts. It setted to “Intraday data only” by default. It boosts NinjaTrader performance. If you need more historical data on chart set this parameter to false and control amount of loaded data by Days to load parameter.
Nevertheless we recommend install MZpack and NinjaTrader on system with minimum 8Gb of memory. Also chek setting for virtual memory in your system. Some SSD tools may limit amount of virtual memory to prolong SSD life. Choose System managed size option in Virtual memory control dialog. If this will be not enough and you still getting “Out of system resources” messages select Custom size for Virtual memory setting and type Initial size 2000Mb and Maximum size 5000Mb of virtual memory.