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{description}
{excerpt}For all trendline types except moving average, sets or returns the number of periods the regression should extrapolate forward.{excerpt}
{signature:C#}
 public double ForecastPeriods{ get; set; }

{signature}{signature:vb.net

}
Public Property ForecastPeriods() As Double

{signature}
{remarks}
Settings this value causes the trendline to extend beyond the end of the data.
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