diff --git a/realtime.py b/realtime.py
index a9cc3d5..25b2e4e 100644
--- a/realtime.py
+++ b/realtime.py
@@ -1860,7 +1860,8 @@ class RealTimeChart:
                         tick_count += 1
                         
                         # Also update the old candlestick data for backward compatibility
-                        self.candlestick_data.update_from_trade(trade_data)
+                        if hasattr(self, 'candlestick_data'):
+                            self.candlestick_data.update_from_trade(trade_data)
                         
                         # Log tick counts periodically
                         current_time = time.time()