Update online.rst

you-n-g · web-flow · commit 3b8087677c6e · 2021-07-16T12:24:33.000+08:00
diff --git a/docs/component/online.rst b/docs/component/online.rst
@@ -21,6 +21,8 @@ which including `Online Manager <#Online Manager>`_, `Online Strategy <#Online S
 If you have many models or `task` needs to be managed, please consider `Task Management <../advanced/task_management.html>`_.
 The `examples <https://github.com/microsoft/qlib/tree/main/examples/online_srv>`_ are based on some components in `Task Management <../advanced/task_management.html>`_ such as ``TrainerRM`` or ``Collector``.
 
+**NOTE**: User should keep his data source updated to support online serving. For example, Qlib provides `a batch of scripts <https://github.com/microsoft/qlib/blob/main/scripts/data_collector/yahoo/README.md#automatic-update-of-daily-frequency-datafrom-yahoo-finance>`_ to help users update Yahoo daily data.
+
 Online Manager
 =============
 
@@ -43,4 +45,4 @@ Updater
 =============
 
 .. automodule:: qlib.workflow.online.update
-    :members:
+    :members:
