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The number of historical bars required before the strategy starts processing calls to the OnBarUpdate() method. This property is generally set via the UI when starting a strategy.
The OnBarUpdate() method is not triggered until CurrentBar >= BarsRequired. In a multi-series strategy this restriction applies only for the primary Bars object. Should your strategy logic intertwine calculations across different Bars objects please ensure all Bars objects have met the BarsRequired requirement before proceeding. This can be done via checks on the CurrentBars array.
An int value representing the number of historical bars.