The Weighted property controls if the moving average points will be calculated using or not the corresponding X point values.
When False, (the default), the average is calculated as the simple sum of Y values divided by the number of points.
When True, each Y value is first multiplied by it's X value and the total sum is divided by the sum of all X point values.
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property WeightedIndex: Boolean;
Set WeightedIndex to true to calculate the Moving Average using the source points index as the "weight".
This differs than using the Weighted property, in which the Weighted property uses the points "X" value as the weight instead of the points index.