diff --git a/README.md b/README.md
index 626116f..e6b9280 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,25 @@ h.data
 - ```reppy_capacity``` (robots cache LRU capacity - default: 100)
 - ```trim_values``` (if set trims output for leading and trailing whitespace - default: True)
 
+You can also pass in all the above arguments prefixed with ```_``` as part of the config.
+
+```python
+CONFIG = {
+    'old_symbol': {
+        'css': '#SymbolChangeList_table tr td:nth-child(1)',
+        'many': True
+    },
+    'new_symbol': {
+        'css': '#SymbolChangeList_table tr td:nth-child(2)',
+        'many': True
+    },
+    '_groups': {
+        'data': '__all__',
+    },
+    '_url': 'http://www.nasdaq.com/markets/stocks/symbol-change-history.aspx'
+}
+```
+
 
 #### Config parameters:
 - By default any key in the config is a rule to parse.
diff --git a/hodor/__init__.py b/hodor/__init__.py
index 782004e..82bf394 100644
--- a/hodor/__init__.py
+++ b/hodor/__init__.py
@@ -19,8 +19,13 @@
 EMPTY_VALUES = (None, '', [], (), {})
 
 
+def _get_value_for_config(key, values):
+    _key = "_{}".format(key)
+    return values['config'][_key] if _key in values['config'] else values[key]
+
+
 class Hodor(object):
-    def __init__(self, url, config={}, proxies={},
+    def __init__(self, config={}, url=None, proxies={},
                  auth=None, ua=DEFAULT_HODOR_UA,
                  pagination_max_limit=DEFAULT_HODOR_MAX_PAGES,
                  crawl_delay=DEFAULT_CRAWL_DELAY,
@@ -30,22 +35,25 @@ def __init__(self, url, config={}, proxies={},
                  reppy_capacity=100):
 
         self.content = None
-        self.url = url
+        self.url = _get_value_for_config('url', locals())
+        if self.url in EMPTY_VALUES:
+            raise Exception("No URL present. Please specify url via parameters or config.")
+
         self.domain = self._get_domain()
-        self.proxies = proxies
-        self.auth = auth
-        self.ua = ua
-        self.trim_values = trim_values
-        self.ssl_verify = ssl_verify
+        self.proxies = _get_value_for_config('proxies', locals())
+        self.auth = _get_value_for_config('auth', locals())
+        self.ua = _get_value_for_config('ua', locals())
+        self.trim_values = _get_value_for_config('trim_values', locals())
+        self.ssl_verify = _get_value_for_config('ssl_verify', locals())
         self.config = {}
         self.extra_config = {}
 
-        self.robots = RobotsCache(capacity=reppy_capacity) if robots else None
+        self.robots = RobotsCache(capacity=reppy_capacity) if _get_value_for_config('robots', locals()) else None
 
         self._pages = []
         self._page_count = 0
-        self._pagination_max_limit = pagination_max_limit
-        self.crawl_delay = self._crawl_delay(crawl_delay)
+        self._pagination_max_limit = _get_value_for_config('pagination_max_limit', locals())
+        self.crawl_delay = self._crawl_delay(_get_value_for_config('crawl_delay', locals()))
 
         for k, v in config.items():
             if k.startswith("_"):