diff --git a/docs/advanced-hyperopt.md b/docs/advanced-hyperopt.md
index 0ef4911cd..c3f286135 100644
--- a/docs/advanced-hyperopt.md
+++ b/docs/advanced-hyperopt.md
@@ -127,7 +127,7 @@ class MyAwesomeStrategy(IStrategy):
         # Define a custom max_open_trades space
         def trades_space(self) -> List[Dimension]:
             return [
-                Integer(1, 10, name='max_open_trades'),
+                Integer(-1, 10, name='max_open_trades'),
             ]
 ```
 
diff --git a/freqtrade/optimize/hyperopt_interface.py b/freqtrade/optimize/hyperopt_interface.py
index b692abea4..25f65cf22 100644
--- a/freqtrade/optimize/hyperopt_interface.py
+++ b/freqtrade/optimize/hyperopt_interface.py
@@ -198,7 +198,7 @@ class IHyperOpt(ABC):
         You may override it in your custom Hyperopt class.
         """
         return [
-            Integer(1, 10, name='max_open_trades'),
+            Integer(-1, 10, name='max_open_trades'),
         ]
 
     # This is needed for proper unpickling the class attribute timeframe