diff --git a/run_backtest.py b/run_backtest.py
index 62af2df..87e196c 100644
--- a/run_backtest.py
+++ b/run_backtest.py
@@ -40,10 +40,7 @@ def create_strategies(entry_time: str):
     )
     return call_spread_strat, put_spread_strat
 
-def run_backtest():
-    # TODO: Start date = yesterday.
-    start_date = datetime(2024, 1, 1)
-    end_date = datetime.now()
+def run_backtest(start_date: datetime, end_date: datetime):
     for entry_time in entry_times():
         call_spread_strategy, put_spread_strategy = create_strategies(entry_time)
         backtest_results = backtest_iron_condor(
@@ -54,9 +51,12 @@ def run_backtest():
             end_date
         )
         # TODO: Think of a better way to handle this.
-        backtest_results.drop('Cumulative Profit', axis=1, inplace=True)
+        backtest_results.drop('Cumulative Profit', axis = 1, inplace = True)
         print(backtest_results)
         insert(backtest_results)
 
 if __name__ == '__main__':
-    run_backtest()
\ No newline at end of file
+    # TODO: Update backtest to eliminate the need for setting this to midnight.
+    end_date = datetime.now().replace(hour = 0, minute = 0, second = 0, microsecond = 0)
+    start_date = end_date - timedelta(days = 1)
+    run_backtest(start_date, end_date)
\ No newline at end of file