Calculates the median of all values from IndexLow to IndexHigh in the SourceChart and returns the median. The function also returns the timestamp of the median value if the SourceChart contains timestamps (SourceChart.Values.IsDateTime=True)
Chart to calculate the median from
Lower bounds index into the SourceChart
Upper bounds index into the SourceChart
TimeStamp of the new value
Note that this function is a class procedure so it may be called even if the TRSCustomChartFunction is not instantiated.
The function can also be called by custom functions. For example, you could create a custom function that calls this function and then does something with the result