<ul data-eligibleForWebStory="false">Anomaly detection (AD) is crucial for identifying deviations in data across various domains.Real-time AD is in demand due to the increase in multivariate sensor data from the (Industrial) Internet of Things.DAD is a new real-time decorrelation-based anomaly detection method for multivariate time series.Experiments show that DAD outperforms state-of-the-art methods in detecting anomalies in high-dimensional data streams.