Req: How to import rates for tickers (financial)?

Hi,

I wonder if it's possible to automatickly import the latest rate for a share by clicking an "update" button in excel. (open, high, low, volume...)

After clicking I would like the worksheet to contain all values from the last time I updated to the present day. None of the previous rates (for past days) are to be deleted. I would like to do this in order to make a graph for the historical rates.
The ticker I'm going to use is YAR (Yara International)

Thanks in advance.