fix: Correct interval format and enhance data fetching error handling in ATR-EMA scanner

src/screener/t_atr_ema_v2.py

@@ -56,8 +56,19 @@ def run_atr_ema_target_scanner(min_price: float, max_price: float, min_volume: i
 
         for ticker, current_price, current_volume, last_update in stocks:
             try:
-                df = get_stock_data(ticker, start_date, end_date, "1D")
+                # Validate interval and fetch data
-                if df.empty or len(df) < 50:
+                VALID_INTERVALS = ["1d", "5m", "15m", "30m", "1h", "4h", "1w"]
+                
+                try:
+                    df = get_stock_data(ticker, start_date, end_date, "1d")
+                    if df.empty or len(df) < 50:
+                        print(f"⚠️ {ticker}: Insufficient historical data ({len(df)} bars)")
+                        continue
+                    if "1d" not in VALID_INTERVALS:
+                        raise ValueError(f"Invalid interval format. Must be one of: {VALID_INTERVALS}")
+
+                except Exception as e:
+                    print(f"❌ Data fetch failed for {ticker}: {str(e)}")
                     continue
 
                 results = indicator.calculate(df)