1. Yeah, a running average would be nice. We have some pretty limited graphing toolkits currently, so I'll have to look at what is possible at the moment.
2. We don't do the date since people on roadtrips can have more than one fill up on a single day (it happened often and was reported as a bug), so we had to instead change it to every fuel up gets a spot on the graph.
3. We're hesitant to include price in too many metrics because it's not something you have tons of control over. We're trying to highlight the things you can change with behavior -- using a lighter foot will save you money and you'll get farther, but with the fluctuations in fuel prices, we don't want to highlight too many things based on price because the price is almost completely out of driver's control.
If you saved $50 this month, it's not because you changed driving habits for the better, it's because gas is 40 cents less per gallon, etc. and there's no way to predict that going forward.
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