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Each dot on this graphic represents an offer to buy or sell stock on the Nasdaq exchange. The graph shows one minute of trading, from left to right. The size of each dot indicates the number of shares being traded. Each dot is coloured according to which stock is being traded, and the vertical position of each dot refers to the price at which that trade is occurring.
Patterns in the stock market are revealed through this method, including the activity of automated traders – the robots that increasingly shake the stock market every day.
To find out more, see http://sta.mn/k6j.
Stamen Design, founded in 2001, has developed a reputation for design and technical leadership in the emerging genre of interactive mapping and live data visualisation
More of its work with corporate clients such as MTV and National Geographic, cultural institutions like the Exploratorium and MoMA, internet giants like Facebook and Google, and open data bodies such as OpenStreetMap, can be found at stamen.com