update 23.1 docs (#191)

Author: ritazakhodyaeva

dashboard-for-desktop/articles/dashboard-designer/dashboard-item-settings/chart.md

@@ -25,8 +25,11 @@ This section is divided into the following subsections.
 
 	Describes coloring capabilities of the Chart dashboard item.
 * [Axes](chart/axes.md)
-	
+
 	Describes how to customize settings related to chart axes.
+* [Trend Indicators](chart/trend-indicators.md)
+	
+	Describes how to create trend indicators and display them in Chart dashboard items.
 * [Legend](chart/legend.md)
 
 	Describes the chart legend and its options.

dashboard-for-desktop/articles/dashboard-designer/dashboard-item-settings/chart/trend-indicators.md

@@ -0,0 +1,99 @@
+---
+title: Trend Indicators
+---
+
+The Dashboard Designer allows you to display trend indicators in Chart dashboard items. 
+
+The following indicator types are available:
+
+* Trend Line
+
+    Displays the general direction of associated points. It is often used to identify existing data trends and can help forecast future trends.
+* Regression Line
+
+    Visualizes data using a mathematical formula that minimizes the distance between the line itself and associated data points. It is used to model the relationship between two variables and can be used to make predictions about one variable based on the value of another.
+* Custom Indicator
+
+    A custom indicator type registered in a dashboard.
+
+##  Create a Trend Indicator 
+
+Click the **Trend Indicators** button in the **Analysis** group of the **Data** Ribbon page. This command invokes the Trend Indicators dialog:
+
+![Trend Indicator Button](../../../../images/create-a-trend-indicator.png)
+
+The dialog contains the following buttons:
+
+* Add
+
+     Creates a new indicator.
+
+* Remove
+
+     Removes the selected indicator.
+
+* OK
+
+     Saves changes and closes the dialog.
+
+* Apply
+
+     Saves changes and keeps the dialog open.
+
+* Cancel
+
+    Closes the dialog and discards unsaved changes.
+
+
+New indicators are generated with default settings:
+
+![Add a new indicator](../../../../images/add-new-indicator.png)
+
+You can change the following settings before displaying an indicator in a Chart dashboard item. 
+
+* Name
+
+   The name of the trend indicator within the indicators collection.
+
+* Type
+
+   The indicator type: Trend Line, Regression Line, or any registered Custom Type.
+
+* Value
+
+   The measure data item that is used to calculate the trend indicator.
+  
+* Value Level
+
+	The value that specifies which series point value should be used to calculate the indicator.
+
+* Display In Legend
+
+	Specifies whether to display the trend indicator in the legend.
+
+* Legend Text
+
+	The text that identifies the trend indicator within the legend.
+
+* Dash Style
+
+	The dash style used to paint the line.
+ 
+* Thickness
+
+	The thickness of the indicator line.
+  
+* Color
+
+	 The color for the trend indicator.
+
+* Visible
+
+	Specifies whether to display the trend indicator.
+
+You can edit the created indicator in the Trend Indicators dialog:
+
+![Configure Trend Line in the UI](../../../../images/configure-trend-line-in-the-ui.png)
+
+
+

dashboard-for-desktop/images/add-new-indicator.png

@@ -110,7 +110,9 @@
         - name: X-Axis
           href: articles/dashboard-designer/dashboard-item-settings/chart/axes/x-axis.md
         - name: Y-Axis
-          href: articles/dashboard-designer/dashboard-item-settings/chart/axes/y-axis.md
+          href: articles/dashboard-designer/dashboard-item-settings/chart/axes/y-axis.md  
+      - name: Trend Indicators
+        href: articles/dashboard-designer/dashboard-item-settings/chart/trend-indicators.md    
       - name: Orientation
         href: articles/dashboard-designer/dashboard-item-settings/chart/orientation.md
       - name: Conditional Formatting

dashboard-for-desktop/images/configure-trend-line-in-the-ui.png

@@ -27,6 +27,9 @@ This section is divided into the following subsections.
 * [Axes](chart/axes.md)
 
 	Describes how to customize settings related to chart axes.
+* [Trend Indicators](chart/trend-indicators.md)
+
+	Describes how to create trend indicators and display them in Chart dashboard items.
 * [Orientation](chart/orientation.md)
 
 	Describes how to toggle the chart's orientation.

dashboard-for-desktop/images/create-a-trend-indicator.png

@@ -0,0 +1,77 @@
+---
+title: Trend Indicators
+---
+
+# Trend Indicators
+
+The Web Dashboard allows you to display predefined trend indicators in Chart dashboard items. 
+
+Trend indicators are statistical tools used to analyze data and identify patterns or relationships between variables.
+
+The following indicator types are available:
+
+* Trend Line
+
+    Displays the general direction of associated points. It is often used to identify existing data trends and can help forecast future trends.
+* Regression Line
+
+    Visualizes data using a mathematical formula that minimizes the distance between the line itself and associated data points. It is used to model the relationship between two variables and can be used to make predictions about one variable based on the value of another.
+* Custom Indicator
+
+    A custom indicator type registered in a dashboard.
+
+## Create a Trend Indicator 
+
+Click **Trend Indicators** in the **Options** dialog to open the **Trend Indicators** editor.
+
+![Trend Indicators Option](../../../../images/trend-indicators-option-web.png)
+
+Click “+” to add a new trend indicator. The new indicator is generated with the default settings and automatically displayed in a chart dashboard item:
+
+![Add new indicator](../../../../images/add-new-indicator-web.png)
+
+You can change the following indicator settings:
+
+* Name
+
+   The name of the trend indicator within the indicators collection.
+
+* Type
+
+   The indicator type: Trend Line, Regression Line, or any registered Custom Type.
+
+* Value
+
+   The measure data item that is used to calculate the trend indicator.
+  
+* Value Level
+
+	The value that specifies which series point value should be used to calculate the indicator.
+
+* Display In Legend
+
+	Specifies whether to display the trend indicator in the legend.
+
+* Legend Text
+
+	The text that identifies the trend indicator within the legend.
+
+* Dash Style
+
+	The dash style used to paint the line.
+ 
+* Thickness
+
+	The thickness of the indicator line.
+  
+* Color
+
+	 The color for the trend indicator.
+
+* Visible
+
+	Specifies whether to display the trend indicator.
+
+In the editor, select an indicator and click **Edit** or **Delete** to edit or delete the selected item.
+
+![manage-indicators-collection](../../../../images/manage-indicators-collection.png)