TradingChart[{"MSFT",{{2009,1,1},{2009,3,31}}},{"LinearRegressionIndicator"}]

({{DocumentationFooterIconsRelatedFunction.png, ({{See Also}, {Related Indicator Types:  (RefLink[LinearRegressionTrendlines, paclet:ref/indicator/LinearRegressionTrendlines])  ▪  (RefLink[LinearRegressionSlope, paclet:ref/indicator/LinearRegressionSlope])  ▪  (RefLink[RaffRegressionChannel, paclet:ref/indicator/RaffRegressionChannel])  ▪  (RefLink[StandardDeviationChannels, paclet:ref/indicator/StandardDeviationChannels])}})}})