diff --git a/README.md b/README.md
index ff01006..72ca71e 100644
--- a/README.md
+++ b/README.md
@@ -83,7 +83,24 @@ with predict_features AS (
 )
 
 select * from {{ dbt_ml.recommend(ref('model'), 'predict_features') }}
+```
+
+The ML.DETECT_ANOMALIES function provides anomaly detection for BigQuery ML.
+
+```sql
+# detect_anomalies_model.sql
+
+{{
+    config(
+        materialized='table'
+    )
+}}
+
+with eval_data as (
+    ...
+)
 
+select * from {{ dbt_ml.detect_anomalies(ref('model'), 'eval_data', threshold) }}
 ```
 
 ### Tuning hyperparameters
diff --git a/macros/detect_anomalies.sql b/macros/detect_anomalies.sql
new file mode 100644
index 0000000..61dc691
--- /dev/null
+++ b/macros/detect_anomalies.sql
@@ -0,0 +1,7 @@
+{% macro detect_anomalies(relation, source, threshold = 0.95) %}
+    ml.detect_anomalies(
+        model {{ relation }},
+        struct({{ threshold }} as anomaly_prob_threshold),
+        (select * from {{ source }})
+    )
+{% endmacro %}
\ No newline at end of file