How do I create an Ajax or Flash widget or badge for my site that shows the total value of my portfolio?

Question

I want to put a small box on my site that shows the latest prices of my own little stock index of about 20 stock picks. It would need to get the latest prices from somewhere, calculate my weightings, and present the up-to-date price of the total index.

How do I do this?

The Yahoo Finance Badge doesn't show the full value of the portfolio/index, just the individual stocks.

Thanks!

Answer 1

There's probably an RSS feed you could use, some blogging sites will display this for you, just tell it the URL to download.

I'm not an Ajax expert, but I've played with it, and this is certainly a good time to use it, I think. Google (or yahoo!) XmlHttpRequest and you'll get lots of info on how to use it.

The hardest part about Ajax is that you can't communicate with a 3rd party server, due to security restrictions in modern browsers. So your ajax code can only communicate with the domain it came from. Because of this you'll need to store the RSS feed on your site and read it from there, or make a proxy on your site that just pulls the RSS feed down and returns it.

Then you'd use your XmlHttpRequest object (on the client side) to get the feed, parse it, and update a div on your page with the info.

Maybe there's an easier way, but this is how I do this kind of stuff.

Answer 2

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Answer 3

Where are you going to fetch the stock data from? If there is some service provider for data then you can use Ajax or Flash. I think using Ajax should be a better idea. As it would be light weight. You can use Dojo toolkit or Prototype Toolkit to get the work done.

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