- Compare positive with negative comments
- Define six moods calm, alert, sure, vital, kind and happy
"...we realized it was the other way round — that a drop in the mood or sentiment of the online community would precede a fall in the market. It meant we could predict the change in the market and that gives you a considerable edge."
This is similar to the art project "We feel fine" by Jonathan Harris where you can see the feelings of the world.
If you want to create your own version you can use this Twitter Streaming API developed by 140dev
Source: The Telegraph