diff --git a/README.md b/README.md
index 78d9970..4164bcd 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,8 @@ The data currently comes from [IQFeed](https://www.iqfeed.net/), so you will nee
 
 All data is returned as a ```pandas``` DataFrame.
 
+Both the start and end dates default to the current day.
+
 ### Daily Data
 
 ```python