This could happen while you aren’t connected to any data provider and press the “Run backtest” button but there is no data for the whole time frame defined in the Backtest properties window.
However, if you have some data on your machine, some statistics will appear calculated on the insufficient data.
There should be a warning message about NinjaTrader cannot download data while disconnected,
and
NinjaTrader should not run the backtest on insufficient data.

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