Canaries in the mine: Retail metrics that help you study the competitionhttps://medium.com/@Semantics3/canaries-in-the-mine-how-observing-retail-site-metrics-helps-you-gauge-your-competitors-sales-97ebfce340d0 by hari_sem3 • 12 years ago 2 0 12 years agoMEmedium.com