<b>It wasn't the score, it was the slope</b>

<b>It wasn't the score, it was the slope</b>

A regional fintech app sat at 78% positive sentiment for eight months. Comfortable. Then over nine days it dropped to 61% — still a passing grade by most playbooks. The team that caught it early wasn't watching the number. They were watching velocity.

The slope told the real story: sentiment was falling roughly 1.9 points a day, and the rate was accelerating after a buggy biometric-login update. A flat 61% looks survivable. A 61% in freefall is a 40% in a week.

They froze the rollout at day four, before most of their user base had even updated. Final floor: 58%, recovered to 74% inside three weeks.

The takeaway: a sentiment number is a snapshot; its first derivative is the forecast. Alert on the rate of change, not the threshold — by the time you cross a line, you're already late.