Hello!
Sorry for my bad english 
I’m looking to make a bar gauge like this pH meter 
I know how to add last value but I can’t find what option I need to choose to obtain this gauge…
the best I could get was this:
Any help please to choose the right option?
Thank you!
other than the arrow and it’s value the rest of the visual is static? I would say go for an svg approach and change the arrow and value data dynamically.
this is just some example
<!DOCTYPE html>
<html>
<body>
<svg id="svgContainer" width="100" height="100">
<path id="arrowPath" d="M10,10 L20,20 L30,10 Z" fill="blue" stroke="black" stroke-width="2"/>
</svg>
<button onclick="changeArrow()">Change Arrow</button>
<script>
function changeArrow() {
const arrowPath = document.getElementById("arrowPath");
arrowPath.setAttribute("d", "M50,10 L70,20 L50,30 Z"); // Change the path to a different arrow shape
arrowPath.setAttribute("fill", "red"); // Change the fill color
arrowPath.setAttribute("stroke", "black"); // Change the stroke color
}
</script>
</body>
</html>
there are plugins that can do that in grafana if you want to go with this above route.
thank you ofr your help 
the bar gauge is statique (value only 0 to 14 for pH)
Can you give me the name of plugin and exemple? 
Thank you very much
maybe you can look at canvas? Oui ou Non?
thank you very much for the exemple! I will try this 