diff --git a/README.rst b/README.rst
index 3eb85fe..8d37f4b 100644
--- a/README.rst
+++ b/README.rst
@@ -11,6 +11,14 @@ Requires
 ========
 - Tryton 6.0
 
+How to
+======
+
+Store values such as stocks, funds and commodities in Tryton.
+Watch the performance. The Tryton module periodically loads
+quotes of values from one or more price sources.
+You can define the course sources yourself.
+
 Changes
 =======