the reference linreg: the least-squares regression line fitted over the last
period values, evaluated offset bars back from its right-hand end.
x runs 0 (oldest bar in the window) to period-1 (current bar), so the value
at the current bar is intercept + slope * (period - 1). A positive offset
steps back down that line, which is how LSMA's offset input shifts the plot
without recomputing the fit.
the reference
linreg: the least-squares regression line fitted over the lastperiodvalues, evaluatedoffsetbars back from its right-hand end.x runs 0 (oldest bar in the window) to period-1 (current bar), so the value at the current bar is
intercept + slope * (period - 1). A positiveoffsetsteps back down that line, which is how LSMA's offset input shifts the plot without recomputing the fit.