The trend lines supported by chart with TrendLine objects can be divided into two groups, including regression and non-regression. In 2D charts, trend lines are typically used in X-Y line, bar, or scatter charts.
Non-regression trendlines are MovingAverage, Average, Minimum, and Maximum. Moving Average trendline is the average over the specified time.
Regression trend lines are polynomial, exponent, logarithmic, power and Fourier functions that approximate the data which the functions trend.