How can I update the data automatically without refreshing the page in firebase flutter?

I have to display total number of Sales and pending sales in the dashboard. I have designed inside the container.
I need to update that every time new sales adds to Firebase Firestore automatically. How can I achieve this.

>Solution :

You may use stream builder or future builder to get data without getting refresh every time.

Here is the docs:

=> https://api.flutter.dev/flutter/widgets/StreamBuilder-class.html
=> https://api.flutter.dev/flutter/widgets/FutureBuilder-class.html