Shows trends and developments for a specific health metric over time.
Compares the current period with the previous (equally long) period.
Parameters:
- metric: One of: 'hrv', 'sleep_duration', 'sleep_score', 'sleep_efficiency', 'readiness',
'resting_hr', 'steps', 'active_minutes', 'weight', 'body_fat',
'stress', 'strain', 'vo2max', 'training_load', 'cardio_load'
- period: Time period: '7d', '30d', or '90d' (default: '30d')
- prefer_provider: Optional. Per-query soft-override (e.g. 'OURA', 'GARMIN').
Influences which provider's data is shown when multiple devices report the same metric.
Connector