From 564f4e25e6baa09b94c8a1975a6556c0c1dbcaf1 Mon Sep 17 00:00:00 2001
From: Justin Oros <JustinOros@gmail.com>
Date: Tue, 27 Jan 2026 17:28:46 -0700
Subject: [PATCH] Fix backtest datetime format to use YYYY-MM-DD instead of
 isoformat for Alpaca API

---
 daytrader.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/daytrader.py b/daytrader.py
index e0284b0..ea20781 100644
--- a/daytrader.py
+++ b/daytrader.py
@@ -515,8 +515,9 @@ def advanced_backtest_strategy():
         end_date = datetime.now()
         start_date = end_date - timedelta(days=BACKTEST_DAYS)
         
-        bars = api.get_bars(SYMBOL, "15Min", start=start_date.isoformat(), 
-                           end=end_date.isoformat()).df
+        # Format dates as YYYY-MM-DD for Alpaca API
+        bars = api.get_bars(SYMBOL, "15Min", start=start_date.strftime('%Y-%m-%d'), 
+                           end=end_date.strftime('%Y-%m-%d')).df
         if len(bars) < 100:
             logger.warning("⚠️  Insufficient data for backtest")
             return True
@@ -1624,4 +1625,4 @@ def main():
         logger.info("🔚  Shutdown")
 
 if __name__ == "__main__":
-    main()
+    main()
\ No newline at end of file