Visualizing Twitch Viewer Ratings in D3js

I made a visualization of the viewer ratings of the starcraft 2 channel TakeTV, you can see the result here. This post provides some background information on the data source and presentation of the data.

Data Source

The visualization displays the number of concurrent viewers of the popular Twitch channels taketv and wcs_europe_de. The number of concurrent viewers was determined once every minute using the Twitch API as explained here. The number of viewers are post processed by very light exponential smoothing.

The visualization lists broadcasts starting from January 1st 2014. It does neither cover all shows that happened since, nor is the data for a broadcast necessarily complete. The project is merely a result of me learning d3js, I’m in no way affiliated with TakeTV and only using their viewer counts for the lack of other interesting time series.

The visualization requires Javascript and SVG browser support.


Here’s a screen capture for those without Javascript enabled:



chart item description
peak concurrent viewers
mean concurrent viewers
last update (for running broadcasts only).
table item description
date and title of broadcast; for broadcast spanning midnight the date is the start date; for broadcast with changing titles, the title is the one shown the longest
currently selected broadcast; click a row to select and chart a broadcast
Click text to sort by metric, click again to reverse order. Selected metric is shown in red.
peak concurrent viewers; bar length reflects number
peak concurrent viewers; bar length is shorter than actual viewers due to space constraints
mean concurrent viewers; position of red-white dot reflects viewer count
start time, end time and duration of broadcast; bar length reflects duration of broadcast
start time, end time and duration of broadcast; bar length is shorter than actual duration due to space constraints
broadcast is in progress
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