Problem is you often don't know if news is really big until a week later. at least, a lot of headlines i think are big have no immediate effect on price, and sometimes the price makes a big move and it takes me a day or 2 to find out what the catalyst was. anyway, I think your best bet is to use IFTTT and use a RSS feed as input, and an sms as output. trick is to find the best RSS feed for your needs...