diff --git a/README.md b/README.md
index cbd9df8..042496b 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,8 @@
 
 [Query] TXN2 data by [Account], [Model] and index pattern. Save a [Query] and execute a saved [Query].
 
+![query data flow](./assets/flow.png)
+
 ## Configuration
 
 Configuration is inherited from [txn2/micro](https://github.com/txn2/micro#configuration). The
diff --git a/assets/flow.graffle b/assets/flow.graffle
new file mode 100644
index 0000000..b262d38
Binary files /dev/null and b/assets/flow.graffle differ
diff --git a/assets/flow.png b/assets/flow.png
new file mode 100644
index 0000000..562028f
Binary files /dev/null and b/assets/flow.png differ