diff --git a/README.md b/README.md
index 959957d4..0fe12d28 100644
--- a/README.md
+++ b/README.md
@@ -16,8 +16,33 @@ Create GA and canary deployments, services and Istio virtual service:
 kubectl apply -f ./artifacts/workloads/
 ```
 
-Start rollout:
+Rollout:
 
 ![rollout-cli](docs/screens/rollout-cli-output.png)
 
+HTTP success rate query:
+
+```sql
+sum(
+    irate(
+        istio_requests_total{
+          reporter="destination",
+          destination_workload_namespace=~"$namespace",
+          destination_workload=~"$workload",
+          response_code!~"5.*"
+        }[$interval]
+    )
+) 
+/ 
+sum(
+    irate(
+        istio_requests_total{
+          reporter="destination",
+          destination_workload_namespace=~"$namespace",
+          destination_workload=~"$workload"
+        }[$interval]
+    )
+)
+```
+