Need software that can analyze live data from a web page?

I need to input live data from a web page to perform instant math functions without having to input manually in Excel. I am trying to rate things by the percentage change and their ranking within the overall list, such as if the price of sugar went down compared to cotton; or if certain of the components of the Dow Jones Industrial are going in the opposite direction from the majority, and if so, which are going against the tide and which has the largest percent stock price increase/decrease; or alternately, which stock is up the most in a particular list of ten, and where is it ranked now as opposed to when trading started for the day (did it move to #1 most advanced or is it still at number 3 and just moving the same as all the rest, etc.). This is not really about Stocks, but I merely used that as an example (as I need to keep the nature of the business confidential); I could have used the rate of temperature change in large cities as the example. Thanks.

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