This Ruby on Rails application demonstrates taking exchange rates from the Open Exchange Rates API and displaying them via Highcharts.
This rails-app uses Webpack ( jsbundling-rails[webpack] ) to bundle Highcharts, then deliver it via the asset pipeline in Rails. Or you can use sprockets for a different way.
git clone https://github.com/cmirnow/exchange-rates-rails-app.git
cd exchange-rates-rails-app
bundle install
bundle exec figaro install
Edit:
#config/application.yml
KEY_OPENEXCHARGERATES: '************************'
rake assets:precompile
rails s