A javascript bookmarklet using d3.js to render live updates of a Betfair market's prices in a pie chart showing the relative probability of a win for each market selection. Each selection is represented as two shades of the same colour (darker for Back size, lighter for Lay size) separated by a section that is the spread between the Back and the Lay. Also added a view of the volume traded over the last 30 seconds or so, with the scales dynamically changing to fit the maximum in that time.

Get the charts at denp1.github.io/bfjs/.

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