How to higlight the higest and loswest value in difrrent color in line chart

[Shivaprasad2452]

HI
I need to develop the chart like below image, i able to achieve it except the highlight the low and high data which are in red dot and greent dot in image

any help is appreciated thanks in advance

[thierryH91200]

look at #2334

search the min and max and modify the color

I do not think it's very complicated