We'll build a dynamic chart using Cube.js, which will allow users to pick a date range and see the corresponding data on a line chart. We'll create a new Cube app, connect it to a cloud-based Postgres dataset, and use the Cube API to generate SQL code that retrieves the data for the selected date range. We'll then visualize this data using Chart.js in our front-end app, which will be built using CodeSandbox. The dynamic chart feature will allow users to select different dates from a date picker, updating the chart accordingly.