The indicator builds the trajectory of the front linear regression and standard deviation points.
The dots, shown by the indicator are based on the linear regression. Two arrays are used to build the regression trajectory: LR_up draws the trajectory of ascending parts and LR_down draws the trajectory of descending parts. Deviation lines are controlled by stdev_koef deviation ratio. The indicator is created so that a trader can easily put any data instead of open prices by changing the code in one place only.