Angular Chart - series.point.image.url
Specifies the URL of the image to be used as a point marker.
Normally, this option accepts one URL as a string value, but if you have a range area series, you may want to specify different images for the minimum and maximum points. In that instance, set the url option to an object with the rangeMinPoint and rangeMaxPoint fields.
rangeMaxPoint
Specifies the URL of the image to be used as a maximum point marker.
rangeMinPoint
Specifies the URL of the image to be used as a maximum point marker.
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