La API histórica de Bittrex ha sido deprecada, por lo tanto el endpoint siguiente ya no tiene validez:
https://bittrex.com/Api/v2.0/pub/market/GetTicks?marketName=USDT-BTC&tickInterval=Day
Código completo del tutorial para graficar la evolución del precio de Bitcoin usando Angular & Echarts.
ng serve --proxy-config proxy.conf.json
Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.
Run ng build to build the project. The build artifacts will be stored in the dist/ directory.
To get more help on the Angular CLI use ng help or go check out the Angular CLI Overview and Command Reference page.