The IChartTrendLines interface contains properties and methods that are used to determine parameters of the trend lines collection.
| Property name | Brief description | |
| Count | The Count property returns the number of trend lines. | |
| Item | The Item property enables the user to determine settings of a specific trend line. |
| Method name | Brief description | |
| Add | The Add method adds a trend line for a data series. | |
| Clear | The Clear method deletes all trend lines from the chart. | |
| Remove | The Remove method removes a trend line by the specified index. |
See also: