Point Customization
You can customize points by initializing the point colors. The customization options allow you to differentiate the [first], [last], [highest], [lowest], and [negative] points. This customization only applicable for line, column and area type Sparkline.
<ej-sparkline id="sparklinecontainer" negativePointColor="red" highPointColor="blue" lowPointColor="orange" startPointColor="green" endPointColor="green">
</ej-sparkline>