Update app.py

app.py

@@ -309,7 +309,7 @@ if run_analysis:
             continue
         
         try:
-            rolling_spreads = edge_rolling(ohlc, window=20, min_periods=10, sign=False)
+            rolling_spreads = edge_rolling(ohlc, window=15, min_periods=10, sign=False)
         except Exception as e:
             st.error("Error computing rolling spread.")
             continue
@@ -319,7 +319,7 @@ if run_analysis:
         
         volume = data['Volume']
         returns = ohlc['Close'].pct_change()
-        rolling_vol = returns.rolling(window=20).std()
+        rolling_vol = returns.rolling(window=15).std()
         upper_band = ohlc['Close'] * (1 + rolling_spreads / 2)
         lower_band = ohlc['Close'] * (1 - rolling_spreads / 2)