diff --git a/README.md b/README.md
index 9f0547b..a13929d 100644
--- a/README.md
+++ b/README.md
@@ -89,10 +89,14 @@ optional arguments:
                         (key,UnitOfMeasure,Min,Max).
   -s, --ssl             HTTPS mode.
   -f SEPARATOR, --field_separator SEPARATOR
-                        Json Field separator, defaults to "."
+                        Json Field separator, defaults to "." ; Select element
+                        in an array with "(" ")"
   -d, --debug           Debug mode.
 ```
 
+Access a specific JSON field by following this syntax: `alpha.beta.gamma(3).theta.omega(0)`
+Dots are field separators (changeable), parantheses are for entering arrays.
+
 More info about Nagios Range format and Units of Measure can be found at [https://nagios-plugins.org/doc/guidelines.html](https://nagios-plugins.org/doc/guidelines.html).
 
 ### Docker Info Example Plugin
diff --git a/check_http_json.py b/check_http_json.py
index c156248..34af286 100755
--- a/check_http_json.py
+++ b/check_http_json.py
@@ -201,7 +201,7 @@ def parseArgs():
 		More information about Range format and units of measure for nagios can be found at https://nagios-plugins.org/doc/guidelines.html\
 		Additional formats for this parameter are: (key), (key,UnitOfMeasure), (key,UnitOfMeasure,Min,Max).')
 	parser.add_argument('-s', '--ssl', action='store_true', help='HTTPS mode.')
-	parser.add_argument('-f', '--field_separator', dest='separator', help='Json Field separator, defaults to "."')
+	parser.add_argument('-f', '--field_separator', dest='separator', help='Json Field separator, defaults to "." ; Select element in an array with "(" ")"')
 	parser.add_argument('-d', '--debug', action='store_true', help='Debug mode.')
 
 	return parser.parse_args()