I have a related question. I want to do MSP-EZE in February but am debating between two dates. Both the dates are at 77,5k miles right now, so I'm okay at waiting. Is it possible/likely that the longer I wait, there is a chance they will go up?

The award calendar is currently showing my return date as "low" priced...does the coloration of the calendar change arbitrarily? That is, can I check back tomorrow and it turns out my return date has somehow become a "peak" day?