Update alpha_vantage.markdown (home-assistant#12660)

tmyoungjr · frenck · web-flow · commit 52aa42b4ae4b · 2020-04-05T00:42:44.000+02:00
* Update alpha_vantage.markdown

Note about API limits

* Update source/_integrations/alpha_vantage.markdown

Co-Authored-By: Franck Nijhof &lt;frenck@frenck.nl&gt;

Co-authored-by: Franck Nijhof &lt;frenck@frenck.nl&gt;
diff --git a/source/_integrations/alpha_vantage.markdown b/source/_integrations/alpha_vantage.markdown
@@ -73,6 +73,10 @@ foreign_exchange:
       type: string
 {% endconfiguration %}
 
+## API Information
+
+Alpha Vantage offers two tiers of the API key, one free and one paid for. If you are using the free version you will be limited to five queries per minute. This means that you'll likely only be able to have one or two ticker entries. The paid version starts at thirty queries per minute increasing ticker quantity quite a bit.
+
 ## Examples
 
 In this section you find some real-life examples of how to use this sensor.
