Creates a trendline for AmSerialChart and AmXYChart charts which indicates the trend of your data or covers some different purposes. Multiple can be assigned.

### Example

    var chart = AmCharts.makeChart("chartdiv",{
    	...
    	"trendLines": [
    		{
    			"initialValue": 1,
    			"initialXValue": 1,
    			"finalValue": 11,
    			"finalXValue": 12
    		}
    	]
    });

### Properties

Property | Type | Default | Description
--- | --- | --- | ---
balloonText | String |  | When set, enables displaying a roll-over balloon.
dashLength | Number | 0 | Dash length.
finalCategory | String |  | String, equal to category value to which trend line should be drawn. It should be used if chart doesn't parse dates.
finalDate | Date |  | Date to which trend line should be drawn. It can be date string (using the same date format as chart.dataDateFormat) or date object.
finalImage | Image |  | Allows to add an image to the end of a trend line.
finalValue | Number |  | Value at which trend line should end.
finalXValue | Number |  | Used by XY chart only. X value at which trend line should end.
id | String |  | Unique id of a Trend line. You don't need to set it, unless you want to.
initialCategory | String |  | String, equal to category value from which trend line should start. It should be used if chart doesn't parse dates.
initialDate | Date |  | Date from which trend line should start. It can be date string (using the same date format as chart.dataDateFormat) or date object.
initialImage | Image |  | Allows to add an image to the beginning of a trend line.
initialValue | Number |  | Value from which trend line should start.
initialXValue | Number |  | Used by XY chart only. X value from which trend line should start.
isProtected | Boolean | false | Used by Stock chart. If this property is set to true, this trend line won't be removed when clicked on eraser tool.
lineAlpha | Number | 1 | Line opacity.
lineColor | Color | #00CC00 | Line color.
lineThickness | Number | 1 | Line thickness.
valueAxis | ValueAxis | ValueAxis | Value axis of the trend line. Will use first value axis of the chart if not set any. You can use a reference to the value axis object or id of value axis.
valueAxisX | ValueAxis | ValueAxis | Used by XY chart only. X axis of trend line. Will use first X axis of the chart if not set any. You can use a reference to the value axis object or id of value axis.

### Methods

TrendLine class does not have any methods.

### Events

Name | Event object | Description
--- | --- | ---
click | {type: "click", TrendLine, chart:AmRectangularChart} | Dispatched when user clicks on a trend line.
rollOut | {type: "rollOut", TrendLine, chart:AmRectangularChart} | Dispatched when user rolls out of a trend line.
rollOver | {type: "rollOver", TrendLine, chart:AmRectangularChart} | Dispatched when user clicks rolls-over a trend line.