Libre arrows describe current rate of change. The arrow tells you what's about to happen; the number tells you what is.
| Arrow | Rate of change | What it tells you |
|---|---|---|
| ↑ | rising fast (> 2 mmol/L per 15 min) | Fast rise - act now |
| ↗ | rising (1-2 mmol/L per 15 min) | Rising - consider correction or walk |
| → | stable (< 1 mmol/L per 15 min) | Steady |
| ↘ | falling (1-2 mmol/L per 15 min) | Falling - check insulin on board |
| ↓ | falling fast (> 2 mmol/L per 15 min) | Pre-empt the hypo |
Libre lasts 15 days - the longest of any mainstream CGM. That makes good skin prep even more important.
Don't take our word - use the tools. Each Explorer models the physiology for your number, your weight, your arrow.
Action 1 Walking a high down earlyBrisk walking brings glucose down within 10-30 min depending on starting value and arrow. → Action 2 Personalised hypo treatmentGlucose dose matched to weight, level and arrow. Glucose only - measure, then wait 20 min. →Interactive tools, graded evidence and long-form reading when you want more than a leaflet.