diff --git a/source/_dashboards/statistic.markdown b/source/_dashboards/statistic.markdown
index e7d03df5ebf..68e65b163bf 100644
--- a/source/_dashboards/statistic.markdown
+++ b/source/_dashboards/statistic.markdown
@@ -64,6 +64,10 @@ footer:
   required: false
   description: Footer widget to render. See [footer documentation](/dashboards/header-footer/).
   type: map
+collection_key:
+  required: false
+  description: "If using `period: energy_date_selection`, you can set a custom key to match the optional key of an `energy-date-selection` card. This is not typically required, but can be useful if multiple date selection cards are used on the same view. See [energy documentation](/dashboards/energy/#using-multiple-collections)."
+  type: string
 {% endconfiguration %}
 
 ## Example
@@ -81,7 +85,7 @@ stat_type: change
 
 ## Options for period
 
-Periods can be configured in 3 different ways:
+Periods can be configured in 4 different ways:
 
 ### Calendar
 
@@ -177,3 +181,16 @@ period:
       seconds: -10
 stat_type: change
 ```
+
+### Dynamic date selection
+
+When placed on a view with an Energy date selection card, the statistic card can be linked to show data from the period selected on the date selection card.
+
+Example of a period from the date selector:
+
+```yaml
+type: statistic
+entity: sensor.energy_consumption
+period: energy_date_selection
+stat_type: change
+```