Is your application ready? Would like to check it out, also any write-up on the tech details of it.
Tech-wise it's Vue.js and Highcharts on the front-end, Firestore on the back, and Zeit now/Firebase functions doing the grunt work on the APIs.
Once it's ready to go I'll pop it on show HN and go into more detail on how it works.
Much of Taucharts is undocumented, Chart.js requires a lot of configuration for something like a mixed chart with stacked bars, and D3, yikes. Its API documentation is thicker than Ulysses.
Highcharts required minimal configuration, had an intuitive and clear API and - most importantly - handled all sorts of messy data I threw at it. It just worked, out-of-the-box.