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-spark-line id="sparkline" negative-point-color="red"
high-point-color="blue" low-point-color="orange" start-point-color="green"
end-point-color="green">
</ej-spark-line>