How do you use the Formulas in the dashboard's query builder?

It’s used to write the mathematical expression on individual queries. Say you have query - A : signoz_calls_total{status_code=“STATUS_CODE_ERROR”} and query - B : signoz_calls_total{} and writing A/B gives you the error percentage of total.

@Fabio Guidotti Do check this video also - might be helpful

thanks very much