diff --git a/daily_data.py b/daily_data.py
index 6db405c..1f36c6d 100644
--- a/daily_data.py
+++ b/daily_data.py
@@ -3,13 +3,18 @@ from pandas import concat, DataFrame
 
 from ohlc import ohlc
 
-def get_daily_data(symbol: str, start_date: datetime = datetime.today() - timedelta(days = 365), 
-        end_date: datetime = datetime.today()) -> DataFrame:
+def get_daily_data(symbol: str, start_date: datetime = None, end_date: datetime = None) -> DataFrame:
+
+    if start_date is None:
+        start_date = datetime.today() - timedelta(days = 365)
+    if end_date is None:
+        end_date = datetime.today()
+
     daily_data = ohlc(symbol = symbol, start_date = start_date, end_date = end_date)
 
     """
     The daily bar is not available for the current day until after market close.
-    It must be calculated using intraday (e.g., 5-minute) bars while the market is open.
+    It must be calculated using intraday bars while the market is open.
     """
     today = datetime.today().date()
     if today not in daily_data['Date'].values: