diff --git a/cloudbt/run_cloudbt.py b/cloudbt/run_cloudbt.py
index a850e6b..4ea860c 100644
--- a/cloudbt/run_cloudbt.py
+++ b/cloudbt/run_cloudbt.py
@@ -2,7 +2,10 @@
 import argparse
 import datetime
 import os
-from typing import List, Optional
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from pathlib import Path
+import threading
+from typing import Dict, List, Optional, Tuple
 import requests
 from myscripts import working_tool
 import dotenv
@@ -91,60 +94,97 @@ def get_pair_data_file_path(pair: str, config_path: str, timeframe: str) -> Opti
         print(f"Warning: Failed to get data file path for pair {pair}: {e}")
         return None
 
+import hashlib
+import json
+
+DATE_CACHE_DIR = Path('.cache') / 'pairs_date'
+
+def _get_cache_path(file_path: Path) -> Path:
+    mtime = file_path.stat().st_mtime
+    file_key = f"{file_path}:{mtime}"
+    hash_key = hashlib.sha256(file_key.encode()).hexdigest()[:32]
+    return DATE_CACHE_DIR / f"{hash_key}.json"
+
+def _load_date_cache(file_path: Path) -> Optional[Tuple[pd.Timestamp, pd.Timestamp]]:
+    cache_path = _get_cache_path(file_path)
+    if cache_path.exists():
+        try:
+            with open(cache_path, 'r') as f:
+                data = json.load(f)
+                return (pd.Timestamp(data['min']), pd.Timestamp(data['max']))
+        except Exception:
+            pass
+    return None
+
+def _save_date_cache(file_path: Path, date_min: pd.Timestamp, date_max: pd.Timestamp) -> None:
+    DATE_CACHE_DIR.mkdir(parents=True, exist_ok=True)
+    cache_path = _get_cache_path(file_path)
+    try:
+        with open(cache_path, 'w') as f:
+            json.dump({'min': str(date_min), 'max': str(date_max)}, f)
+    except Exception as e:
+        print(f"Warning: Failed to save date cache for {file_path}: {e}")
+
 def filter_pairs_by_timerange(pairs: List[str], timerange: str, config_path: str, timeframe: str) -> List[str]:
     """Filter pairs based on timerange, checking if data exists for the given timerange"""
     print(f"Checking pair data availability for timerange: {timerange}...")
-    valid_pairs = []
-    invalid_pairs = []
     
     try:
-        # Parse timerange string into start and end dates
         start_str, end_str = timerange.split('-')
         start_date = datetime.datetime.strptime(start_str, '%Y%m%d')
         end_date = datetime.datetime.strptime(end_str, '%Y%m%d')
-        
-        # Convert to pandas Timestamps for comparison
         start_ts = pd.Timestamp(start_date)
         end_ts = pd.Timestamp(end_date)
-        
-        for pair in pairs:
-            file_path = get_pair_data_file_path(pair, config_path, timeframe)
-            if file_path is not None:
-                try:
-                    # Read only the date column to check data availability
-                    df = pd.read_feather(file_path, columns=['date'])
-                    if not df.empty:
-                        # Convert date column to datetime
-                        df['date'] = pd.to_datetime(df['date'])
-                        
-                        # Remove timezone if present
-                        if df['date'].dt.tz is not None:
-                            df['date'] = df['date'].dt.tz_convert('UTC').dt.tz_localize(None)
-                        
-                        # Check if there's data within the timerange
-                        mask = (df['date'] >= start_ts) & (df['date'] <= end_ts)
-                        if any(mask):
-                            valid_pairs.append(pair)
-                        else:
-                            invalid_pairs.append(pair)
-                    else:
-                        invalid_pairs.append(pair)
-                except Exception as e:
-                    print(f"Warning: Error reading data for pair {pair}: {e}")
-                    invalid_pairs.append(pair)
-            else:
-                invalid_pairs.append(pair)
     except Exception as e:
         print(f"Error parsing timerange: {e}")
         return []
-    
+
+    def get_date_range(file_path: Path) -> Tuple[pd.Timestamp, pd.Timestamp]:
+        cached = _load_date_cache(file_path)
+        if cached is not None:
+            return cached
+        
+        try:
+            df = pd.read_feather(file_path, columns=['date'])
+            if df.empty:
+                result = (pd.Timestamp.max, pd.Timestamp.min)
+            else:
+                df['date'] = pd.to_datetime(df['date'])
+                if df['date'].dt.tz is not None:
+                    df['date'] = df['date'].dt.tz_convert('UTC').dt.tz_localize(None)
+                result = (df['date'].min(), df['date'].max())
+            
+            _save_date_cache(file_path, result[0], result[1])
+            return result
+        except Exception as e:
+            print(f"Warning: Error reading data for {file_path}: {e}")
+            result = (pd.Timestamp.max, pd.Timestamp.min)
+            _save_date_cache(file_path, result[0], result[1])
+            return result
+
+    def check_pair(pair: str) -> Tuple[str, bool]:
+        file_path = get_pair_data_file_path(pair, config_path, timeframe)
+        if file_path is None:
+            return (pair, False)
+        
+        file_min, file_max = get_date_range(file_path)
+        has_data = not (file_max < start_ts or file_min > end_ts)
+        return (pair, has_data)
+
+    max_workers = min(32, len(pairs), os.cpu_count() or 4 * 5)
+    with ThreadPoolExecutor(max_workers=max_workers) as executor:
+        results = list(executor.map(check_pair, pairs))
+
+    valid_pairs = [pair for pair, is_valid in results if is_valid]
+    invalid_pairs = [pair for pair, is_valid in results if not is_valid]
+
     if invalid_pairs:
         print(f"Filtered out {len(invalid_pairs)} pairs with no data in the specified timerange:")
-        for pair in invalid_pairs[:10]:  # Show only first 10
+        for pair in invalid_pairs[:10]:
             print(f"  - {pair}")
         if len(invalid_pairs) > 10:
             print(f"  ... and {len(invalid_pairs) - 10} more pairs")
-    
+
     print(f"Kept {len(valid_pairs)} pairs with available data")
     return valid_pairs