diff --git a/src/exchanges/ls.py b/src/exchanges/ls.py
index 16ddd41..1626b13 100644
--- a/src/exchanges/ls.py
+++ b/src/exchanges/ls.py
@@ -1,4 +1,6 @@
 import requests
+import csv
+import io
 from datetime import datetime
 from typing import List
 from .base import BaseExchange, Trade
@@ -25,35 +27,32 @@ class LSExchange(BaseExchange):
                 response = requests.get(url, headers=headers)
                 response.raise_for_status()
             
-            import csv
-            import io
-            f = io.StringIO(response.text)
-            # Header: isin;displayName;tradeTime;price;currency;size;orderId
-            reader = csv.DictReader(f, delimiter=';')
-            
-            trades = []
-            for item in reader:
-                try:
-                    price = float(item['price'].replace(',', '.'))
-                    quantity = float(item['size'].replace(',', '.'))
-                    isin = item['isin']
-                    symbol = item['displayName']
-                    time_str = item['tradeTime']
-                    
-                    # Format: 2026-01-23T07:30:00.992000Z
-                    ts_str = time_str.replace('Z', '+00:00')
-                    timestamp = datetime.fromisoformat(ts_str)
-                    
-                    all_trades.append(Trade(
-                        exchange=self.name,
-                        symbol=symbol,
-                        isin=isin,
-                        price=price,
-                        quantity=quantity,
-                        timestamp=timestamp
-                    ))
-                except Exception:
-                    continue
+                f = io.StringIO(response.text)
+                # Header: isin;displayName;tradeTime;price;currency;size;orderId
+                reader = csv.DictReader(f, delimiter=';')
+                
+                for item in reader:
+                    try:
+                        price = float(item['price'].replace(',', '.'))
+                        quantity = float(item['size'].replace(',', '.'))
+                        isin = item['isin']
+                        symbol = item['displayName']
+                        time_str = item['tradeTime']
+                        
+                        # Format: 2026-01-23T07:30:00.992000Z
+                        ts_str = time_str.replace('Z', '+00:00')
+                        timestamp = datetime.fromisoformat(ts_str)
+                        
+                        all_trades.append(Trade(
+                            exchange=self.name,
+                            symbol=symbol,
+                            isin=isin,
+                            price=price,
+                            quantity=quantity,
+                            timestamp=timestamp
+                        ))
+                    except Exception:
+                        continue
             except Exception as e:
                 print(f"Error fetching LS data from {url}: {e}")
         return all_trades