set is_open to false on sell order

persistence.py

@@ -83,6 +83,7 @@ class Trade(Base):
         self.close_profit = profit
         self.close_date = datetime.utcnow()
         self.open_order_id = order_id
+        self.is_open = False
 
         # Flush changes
         Trade.session.flush()

test/test_persistence.py

@@ -22,6 +22,7 @@ class TestTrade(unittest.TestCase):
             self.assertEqual(trade.close_rate, 1.0)
             self.assertEqual(trade.close_profit, profit)
             self.assertIsNotNone(trade.close_date)
+            self.assertFalse(trade.is_open)
 
 
 if __name__ == '__main__':