Reportz offers you a way to easily add some of the most standard metrics using our predefined widgets, but if you need something more specific you can use custom filters by following these easy steps:
1. Select source
2. From widgets dropdown menu select Custom
3. Choose metrics, dimension and segment you want or type your query in the custom filter field.
List of available filter syntax, operators and expressions https://developers.google.com/analytics/devguides/reporting/core/v3/reference?hl=en#filters.
For example, if you want to show organic conversions coming from the USA, the filter setup would look like this: