It would be great to see a historical conversion graph for the currency conversion widget, as is available on Google. The functionality is seriously useful to gauge changes in values over time.
Kagi (Mobile)

Google (Mobile)

Kagi (Desktop)

Google (Desktop)

Perhaps the integration with WA will allow for this feature given a historical graph is displayed when one clicks through the widget?

Importantly, I would want to see the interactivity of the Google widget graph replicated, as below.
Interactivity (Mobile)
Interactivity (Desktop)