My basket index
Base 100 at each product's first sighting. Only products seen more than once take part,
and each counts once per month — a weekly staple cannot drown out the rest.
When you shop
The week is a cycle, so it is drawn as one — the further a day
reaches, the more it costs you.
Your rhythm
Four numbers that would be wasted on a chart.
Every trip
One bubble per receipt, sized by how many items were in it. A monthly total
hides the shape of the month — four even trips and one enormous one
add up the same.
Where the money went
The price move multiplied by how much you actually bought. +50% on a
40-cent item is 20 cents; +6% on a weekly staple is a line in the budget.
Same price, less content
What a kilo or a litre actually costs, so a smaller pack at the same price
stops being invisible.