_grafana-viz-prereqs.md

Before you begin, make sure you have:

• Created a Timescale service.
• Installed a self-managed Grafana account, or signed up for Grafana Cloud.
• Ingested some data to your database. You can use the stock trade data from the Getting Started Guide.

The examples in this section use these variables and Grafana functions:

• $symbol: a variable used to filter results by stock symbols.
• $__timeFrom()::timestamptz & $__timeTo()::timestamptz: Grafana variables. You change the values of these variables by using the dashboard's date chooser when viewing your graph.
• $bucket_interval: the interval size to pass to the time_bucket function when aggregating data.