Initial commit - BTC Trading Dashboard

- FastAPI backend with PostgreSQL database connection
- Frontend dashboard with lightweight-charts
- Technical indicators (SMA, EMA, RSI, MACD, Bollinger Bands, etc.)
- Trading strategy simulation and backtesting
- Database connection to NAS at 20.20.20.20:5433
- Development server setup and documentation

test_db.py

@@ -0,0 +1,63 @@
+import asyncio
+import os
+from dotenv import load_dotenv
+import asyncpg
+
+load_dotenv()
+
+async def test_db_connection():
+    """Test database connection"""
+    try:
+        conn = await asyncpg.connect(
+            host=os.getenv('DB_HOST'),
+            port=int(os.getenv('DB_PORT', 5432)),
+            database=os.getenv('DB_NAME'),
+            user=os.getenv('DB_USER'),
+            password=os.getenv('DB_PASSWORD'),
+        )
+        
+        version = await conn.fetchval('SELECT version()')
+        print(f"[OK] Database connected successfully!")
+        print(f"  Host: {os.getenv('DB_HOST')}:{os.getenv('DB_PORT')}")
+        print(f"  Database: {os.getenv('DB_NAME')}")
+        print(f"  User: {os.getenv('DB_USER')}")
+        print(f"  PostgreSQL: {version[:50]}...")
+        
+        # Check if tables exist
+        tables = await conn.fetch("""
+            SELECT table_name FROM information_schema.tables
+            WHERE table_schema = 'public'
+            ORDER BY table_name
+        """)
+        
+        table_names = [row['table_name'] for row in tables]
+        print(f"\n[OK] Found {len(table_names)} tables:")
+        for table in table_names:
+            print(f"  - {table}")
+        
+        # Check candles count
+        if 'candles' in table_names:
+            count = await conn.fetchval('SELECT COUNT(*) FROM candles')
+            latest_time = await conn.fetchval("""
+                SELECT MAX(time) FROM candles 
+                WHERE time > NOW() - INTERVAL '7 days'
+            """)
+            print(f"\n[OK] Candles table has {count} total records")
+            if latest_time:
+                print(f"  Latest candle (last 7 days): {latest_time}")
+        
+        await conn.close()
+        return True
+        
+    except Exception as e:
+        print(f"[FAIL] Database connection failed:")
+        print(f"  Error: {e}")
+        print(f"\nCheck:")
+        print(f"  1. NAS is reachable at {os.getenv('DB_HOST')}:{os.getenv('DB_PORT')}")
+        print(f"  2. PostgreSQL is running")
+        print(f"  3. Database '{os.getenv('DB_NAME')}' exists")
+        print(f"  4. User '{os.getenv('DB_USER')}' has access")
+        return False
+
+if __name__ == '__main__':
+    asyncio.run(test_db_connection())