If you want to stop a particular campaign when it hits a certain spending, can you setup an alert to do that instead of checking the spending daily? If so how? Thank you.
You don't need alerts to do that. Use their automation rules instead. They can do exactly what you want automatically.
I second what PPC Coach has recommended, further to it please read this interesting article : http://searchengineland.com/how-to-use-automated-rules-in-google-adwords-73312. Hope this too is of help.