dual axes can be good, right? they work here ok https://vis.social/media/lJ0t7qEC9Hx9CS9FhDQ

@tomshanleynz It's not terrible. But could be better, depending on the key message. If we're trying to say x grew faster than y, or the ratio is changing thusly, there are better ways. This is just information, not insight.

For example, I'm a huge fan of what @wisevis has doe to illustrate dual axis as time ribbon scatter plot things. https://excelcharts.com/redraw-troops-vs-cost-time-magazine/

Chart redraw: Troops Vs. Cost (Time Magazine)

Time Magazine published a very boring combo dual-axes chart with a broken scale. Most of the time these charts beg for a connected scatterplot, so I made the one above. The original chart was something like this: I'm sorry, Time mag,  but my chart tells

The Excel Charts Blog
@noahi @wisevis i do like connected scatter plots. would like to see these types of plots getting more air time in
@noahi @wisevis (btw, i'm finding it increasingly hard to remember who the people are behind all these the "wiseviz" or "vizwiz" or "vizzywizzyletsgetbizzy" pseudonyms on social media!)
@tomshanleynz @wisevis I like to think my brand is memorable and unique. ;-)