r15,
Please elaborate what exactly you mean by "Real Stock tracker". If you simply want to get the stock prices in excel, you have two options:
1. Use NOW integration and get the realtime data in excel from NOW.
2. If you are not so particular about realtime data and are ok with 5 minute delay, or do not have means to get NOW then you can use web query feature in excel to get prices from yahoo. If you google this you should be able to get info on the same.
Thanks,
SmartTradeOnline.in