@d_vineet,
Assigning color to every dataPoints based on the risingColor or fallingColor will work fine in your case. Please check the below code snippet –
function changeBorderColor(chart){
var dataSeries;
for( var i = 0; i < chart.options.data.length; i++){
dataSeries = chart.options.data[i];
for(var j = 0; j < dataSeries.dataPoints.length; j++){
dataSeries.dataPoints[j].color = (dataSeries.dataPoints[j].y[0] <= dataSeries.dataPoints[j].y[3]) ? (dataSeries.risingColor ? dataSeries.risingColor : dataSeries.color) : (dataSeries.fallingColor ? dataSeries.fallingColor : dataSeries.color);
}
}
}
Also kindly, take a look at this updated JSFiddle.

___________
Indranil Deo
Team CanvasJS