Linear Regression (LINEARREG)

Interpretation / Algorithm
Linear Regression with Metastock screenshot [paritech.com]
Linear Regression [wikipedia.org]
Technical Analysis Studies [prophet.net]

Product Implementation	Function / Formula / Script / Source Code
Genius Trader [geniustrader.org]	PERL Script - GT::Indicators::LinearRegression [geniustrader.org]
TA-Lib [ta-lib.org]	C/C++ Source Code - TA_LINEARREG()