Update README.md

Author: gaearon

README.md

@@ -261,3 +261,5 @@ Redux has no opinion on how you do this in your project.
 ### What about `waitFor`?
 
 I wrote a lot of vanilla Flux code, and my only use case for it was avoiding emitting a change before a related Store consumes the action. In Redux this doesn't matter because the change is only emitted after *all* Stores have consumed the action.
+
+If several of your Stores want to read data from each other and depend on each other, it's a sign they should'be been a single Store instead.