Rain analyse - last 3 days

Hello everyone. I nee help with my rain sensor and the usage of the data.

I have the netatmo rain sensor which has the sensor.netatmo_max_indoor_regen_rain_today sensor. It cumulates the rain for the day.
Now I want to cumulate the daily rain of the days to know how many rain we had the last 3 days.
So in the end I need a sensor with the flowing value of the rain of the last 3 days.

Does someone has an idea?

You are probably looking for the history stats integration.