When you symbolise a layer in ArcMap, the symbols are ordered from low value to high value by default. Is that necessarily "correct"?
I've never officially studied cartography - is there a convention on whether to order items from low-to-high or high-to-low in a legend? Are both ways correct?
Edit: here's a screenshot of the symbology dialog in ArcMap, showing median weekly rents. It's ordered from low-to-high by default, but has the option to flip the order:
Here's how it appears via ArcGIS Server on a website:
Note that my question is about cartographic standards in general, and is not limited to ArcMap.