Anecdotalytically
The early observational, situational, and circumstantial analysis of various “tipping points.” Identifying trends in goods, services, styles, and behaviors prior to notable increases or decreases in usage; simply through observing them with your own eyes and/or anecdotal evidence shared by other people who are not associated with media or other analytical professionals.
I knew anecdotalytically that the price of those Jordans were gonna blow up, I saw 16 people wearing them on Melrose last week.