We built this tool so that we could build charts using GraphQL as a data-source.
This is a super neat fit especially with creating tables and views in Postgres and getting charts easily.
Hope you find it useful.
The Hasura and Postgres combo is ideal because you can have complicated aggregations over the Postgres data in the form of views and Hasura can help you query them realtime over GraphQL. Also Postgres has nice community tools around it like PostGIS and Timescale which help you handle geolocation and timeseries type of data that is often used for visualisations.
PS: Co-author here. And I am an engineer at Hasura.