SeriesTrendline

The configuration options of the series trendlines.

Name	Type	Default	Description
forecast?	TrendlineForecast		The trendline forecast settings. By default, the trendline does not display a forecast. The forecast setting is supported for Linear Trendlines on date and scatter series.
order?	number		The order (degree) of the Polynomial trendline. The default value is 2. Accepted values are from 2 to 6: 2: a Quadratic polynomial trendline with a single extreme point (minimum or maximum) point. 3: a Cubic polynomial trendline with up to 2 extreme points. 4: a polynomial trendline of 4th degree with up to 3 extreme points. 5: a polynomial trendline of 5th degree with up to 4 extreme points. 6: a polynomial trendline of 6th degree with up to 5 extreme points.
period?	number		The number of intervals to take when calculating averages. The value should be an integer greater than 2. The period setting is supported only for Moving Average trendlines.