you need to get an account: First, their help desk if very tolerant ( I've accused them of not supporting anything and they keep geting back to me...). But, to answer your immediate question: You want the "Save Search" option that shows up on the right of the search criteria. If you click this, it pops up a new window asking if you want updates mailed etc. I guess this is not so intuitive and I'm not sure if the option is offered until you create a free account and login.
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