Update app.py

app.py

@@ -78,7 +78,7 @@ def fetch_data(symbol='ETH', tsym='USD', start_date='2021-01-01', api_key='66bc6
         return None
 
 def calculate_ema(data, span=20):
-    data['EMA'] = data['Close'].ewm(span=span, adjust=False).mean()
+    data['EMA'] = data['close'].ewm(span=span, adjust=False).mean()
     return data
 
 def run_model():
@@ -97,7 +97,7 @@ def run_model():
             
             obs = env.reset()
             dates = new_data.index[50:]
-            prices = new_data['Close'][50:]
+            prices = new_data['close'][50:]
             emas = new_data['EMA'][50:]
             actions = []