diff --git a/src/mplfinance/_arg_validators.py b/src/mplfinance/_arg_validators.py
index 32ec18a..e067f83 100644
--- a/src/mplfinance/_arg_validators.py
+++ b/src/mplfinance/_arg_validators.py
@@ -141,10 +141,10 @@ def _valid_mav(value, is_period=True):
         if not isinstance(value,(tuple,list,int)):
             return False
         if isinstance(value,int):
-            return (value >= 2 or not is_period)
+            return (value >= 1 or not is_period)
         # Must be a tuple or list here:
         for num in value:
-            if not isinstance(num,int) or (is_period and num < 2):
+            if not isinstance(num,int) or (is_period and num < 1):
                 return False
         return True