Depends on your style, and also your choice of stock. Personally, I think it is a good way to trade. All this intraday scanning is distracting and generally produces lengthy lists of stocks that you know little or nothing about. Often there is a news release on them that day, and you are also faced with interpreting the market's reaction to the news. Some stocks do seem to have their own trading rhythm, and I like to get a feel for that before trading them.