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When a value of a bar '''N''' bars ago is referenced in a script, the study can only be visualized starting with the '''N + 1''' bar.
The number of previous bars that must be available for a script in order to start performing calculations is called '''Maximum number of bars a study will reference''', or '''MaxBarsBack'''. The '''MaxBarsBack''' value can be selected to be detected automatically or set manually.
The '''MaxBarsBack''' value can be selected to be detected automatically or set manually. When detected automatically, '''MaxBarsBack '''will initially be set to the value of the largest data offset in the study; however, if a variable data offset is used in the script, the initial '''MaxBarsBack ''' value may prove to be too small. In such a case, the '''MaxBarsBack '''value will automatically be increased by 5 or by a factor of 1.618, whichever yields a higher value, and the study recalculated.
The process of automatic '''MaxBarsBack '''detection may cause some functions to be executed repeatedly for the first few bars of a chart when a study is first applied; this can be avoided by setting the '''MaxBarsBack ''' value manually.
