Hi @KE_vf,
You could certainly do that within a worksheet, but you’d have to write a custom indicator to make the arrow.
If you are adverse to writing code, you could always use Bar Color as an alternative with whatever your condition for drawing the arrow would be. Then the bar would just be highlighted instead of having an arrow drawn.
If you’re code-savvy and want specifically this behavior, follow the CI Graphics tutorial - it’s almost what you want to do already; it teaches you how to draw dots or exclamation bubbles over select bars.
Hope this helps!