Revolve, Nordstrom, and ASOS are three of the most powerful trend barometers in US online fashion. Revolve\'s curated influencer-driven assortment reflects what the Instagram-generation is buying at premium price points. Nordstrom\'s department store breadth captures cross-generational demand across mainstream and premium categories. ASOS\'s volume and speed reveal what young fashion buyers are actually clicking on and converting — across tens of thousands of SKUs.