No you shouldn’t.
Philosophy of Flux
Computed properties are non-integral parts of the presentation layer and what presentation is for? – to represents. If you are changing the presentation layer then you are using the presentation layer for reverse information flow. Information flow must be in a single direction – From Top to Bottom. By using binding computed properties you will probably end up in having a loop because X changes Y and Y changes X because of computation so one. This circular flow of information will be easy to detect as it will crash the browser or the browser will stop responding because of infinite loop will be observed.
What do use then?
You can bind two different data and send the results of computed data along with form data.