The USDA publishes daily prices for about 290 commodities — what growers were paid at the shipping point, what buyers paid at big-city wholesale markets, what supermarkets advertised — as dozens of separate text reports with no history. Kadoa’s tracker stitches them into one page with a year of sparklines: Idaho onions up 100% year on year, New York wholesale eggs down 64% to 82 cents a dozen, longan nearly doubling in a week. Open source, updated every business day.