diff --git a/lib/discourse_chatbot/functions/stock_data_function.rb b/lib/discourse_chatbot/functions/stock_data_function.rb
index cb204752..46335594 100644
--- a/lib/discourse_chatbot/functions/stock_data_function.rb
+++ b/lib/discourse_chatbot/functions/stock_data_function.rb
@@ -15,15 +15,14 @@ def name
 
     def description
       <<~EOS
-        An API for MarketStack stock data
-
-        You need to call it using the stock ticker.#{'  '}
+        An API for MarketStack stock data.  You need to call it using the stock ticker.  You can optionally also provide a specific date.
       EOS
     end
 
     def parameters
       [
        { name: 'ticker', type: String, description: "ticker for share or stock query" },
+       { name: 'date', type: String, description: "date for data in format YYYY-MM-DD" }
       ]
     end
 
@@ -46,8 +45,7 @@ def process(args)
         api_response = JSON.parse(json)
 
         ticker = api_response['data'][0]['symbol']
-
-        uri = URI("http://api.marketstack.com/v1/eod/latest")
+        uri = args[parameters[1][:name]].blank? ? URI("http://api.marketstack.com/v1/eod/latest") : URI("http://api.marketstack.com/v1/eod/#{args[parameters[1][:name]]}")
 
         params = {
           access_key: "#{SiteSetting.chatbot_marketstack_key}",
diff --git a/plugin.rb b/plugin.rb
index d2323f93..12e4229f 100644
--- a/plugin.rb
+++ b/plugin.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 # name: discourse-chatbot
 # about: a plugin that allows you to have a conversation with a configurable chatbot in Discourse Chat, Topics and Private Messages
-# version: 0.28
+# version: 0.29
 # authors: merefield
 # url: https://github.com/merefield/discourse-chatbot