Gekko Backend is an API written for Gekko, a market share visualizer. The code is written in Node.js and the development environment is bootstrapped with Vagrant. The data is stored in PostgreSQL, retrieved using pg, processed using async, and all requests are served using express.
Gekko is a market share visualization app written with D3's Treemap, Highstocks, & AngularJS. It allows you to see the size of market sectors and how they change through time.
The subsectors are clickable! When you click on one, a dialog with each related subsector and their prices will appear. Within this same dialog you can compare non-related sectors to each other.