My 2 pips:
Intraday trading based on fundamentals is imho worse than throwing a dice regarding edges.
There are two "animals" who buy and sell...
The first animal trades intraday and extraday, but mostly based on technical analysis. Some might be profitable also with other information, but that might be the class with insider relationships.
So, how pretty is your edge trading on fundamentals intraday without insider relationships?
...Big pockets buy if it is a bargain on the weekly, monthly or yearly chart and sell if it's rather expensive there. I doubt most of them even look below a daily chart.