Thanks @Tess.
I'm a bit confused by the use of the term "plotly formating" as I'm using Charts V2 — Are they also based on plotly technology?
Anyway, I'm going to try this answer Hovertemplate questions for charts V2 - #2 by Darren from @James_Tuxbury's topic.
Quick feedback tho: the "Use array" checkbox is very hard to find btw, as you first have to click on "FX" prior to see it.
Will try this out. Thanks!