How to calculate the highest value per week period?

[wholelottared]

Hello!

I want to calculate the highest value per week on a chart. I have a data set as you can see on my screenshot. The data set 'Reading' hits high and low values every day and is separated by weeks. I would like to show the highest point (max value) of each week period or two week period. What's the best expression/chart to express this?

For example:

week 1 (04/28) the highest value of max value, 4.08

week 2 (05/12) the highest value, 4.73 and so on via a visual chart. 

Any help is greatly appreciated!

[Vegar]

I world like to kindly advice you that there is no need to double post questions on the Qlik community forums.

I've already tried to answer your question in this duplicate thread : https://community.qlik.com/t5/Qlik-Sense-App-Development/How-to-calculate-the-highest-value-per-week...