The backend is a Go app that collects pricing and volume data from many global crypto-currencies exchanges every 5 minutes. The price is calculated based on a volume weighted average. For every exchange token-pair a graph is created to map the price to a USD price for example NEO -> ZEN -> USDT -> USD this way we can discover a USD and BTC price for every token.<p>This is just a fun side project I wanted to understand crypto exchanges and prices a little better.<p>I also built 42Wallet an open source client side HD Ethereum wallet. <a href="http://42wallet.com/" rel="nofollow">http://42wallet.com/</a>