Signal Decay Window

Signal Decay Window is the interval between when a trend first becomes detectable and when it becomes common knowledge, and that interval is the actual product an agency sells. A signal caught 12 months early supports a strategy retainer; the same signal caught at month two supports a single campaign. Exploding Topics tracks topics roughly 12 months before mainstream adoption, while Visualping flags a competitor's pricing page change within hours, and those two clocks run at completely different speeds. The framework asks operators to classify every monitored signal by its decay window before deciding how to package it. Short-window signals (a rival's page edit, a regulatory filing) belong in a monitoring retainer billed monthly. Long-window signals (a category forming around a new behavior) justify positioning work priced against the client's revenue, not hours. Mispricing the window is the most common margin leak in trend work.