I'm also in the charting/bitcoin graphs business :D checkout https://bitbank.nz we managed to distinguish ourselves by providing live machine learning forecasts combined with granular data that lets you see the price action/movement easily and just focusing on keeping it simple and not adding too many crazy indicators and arbitrary lines. i like this product in much the same way, very clean and nice color scheme.
We use a google app engine/firebase/plotly so we look a bit different to the traditional style, i notice your using a websocket, so your aggregating data on your backend? we are also doing that which gets a bit expensive (and we crunch though a few million previous examples over loads of altcoin markets every few seconds to make predictions). I wonder if there's a way to deffer some operations straight through to the exchanges / data providers?
Let me know if youd be interested in adding some of our forecasts to your graphs, We have a live data feed API for our forecasts you can subscribe too. ill give you the product for free if you let me know your from ohmycoin/HN :) we also have an affiliate program so if you link back to us you can make .003btc every paying user referred :)
Thanks, awesome work! :)
Kind Regards, Lee - founder https://bitbank.nz