> For the complete documentation index, see [llms.txt](https://support.tiger.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.tiger.com/english/windows/chart/graphical-objects-in-chart-window/linear-regression.md).
# Linear Regression
Linear Regression is a graphical object on the Drawing toolbar, which is plotted as a guided regression channel.
A regression channel is a channel that when building, will adjust its boundaries by itself.
Enabled on the Drawing toolbar with the button **Linear Regression**.
### Linear Regression instrument settings
#### Parameters
| Name | Description |
| --------------- | ----------------------------------------------------------------------------------------------------- |
| Up Line | This option enables / disables the display of the upper channel line on the chart. |
| Center Line | This option enables / disables the display of the middle channel line on the chart. |
| Down line | This option enables / disables the display of the lower channel line on the chart. |
| Guide Lines | The option enables / disables the display of two vertical guides that bound the channel on the chart. |
| Regression Type | Sets the type of lines displayed on the chart. |
#### Line
| Name | Description |
| ------------ | ------------------------------------------------------------------------------- |
| Expand start | Extends all lines to the left of the chart beginning. |
| Expand end | Extends all lines to the right from the chart beginning. |
| Line Color | Sets the line color. |
| Line Width | Sets the line width. |
| Line Style | Sets the line display style: solid, dashes, point, dash-point, dash-two points. |
#### Object
| Name | Description |
| ---------- | ---------------------------------------------------------- |
| Visibility | Sets the parameter on which the channel will be displayed. |
| Position | Display of a channel above or below the chart. |
#### Control points
| Name | Description |
| ----------- | ------------------------------------------------------------------------------- |
| Time, Price | Ability to manually set the coordinates of points on the time and price scales. |
| Lock | The option enables a position on the chart to be locked. |
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