As many are aware, the iChart api has been terminated. After looking for several days, I have a found a working alternative. Hope this helps, cheers.
Replace the address with google and specify your time frame / symbol of interest for desired results:
I see why you say "Replace the address with google" Yahoo will only let you put in links that go to Yahoo. So you put yahoo in the link to satisfy the fowum limitations, but to use it we have to put in google where you have yahoo in the URL.