The perils of following an approach that advocates short-term trading with the allure of high profits are numerous:
You're going to rack up enormous brokerage commissions.
On occasions where your short-term trades produce a profit, you pay high ordinary income tax rates rather than the far lower capital gains rate for investments held more than 12 months.
You're not going to make big profits- quite the reverse. If you stick with this approach, you'll underperform the market averages.
You're going to make yourself a nervous wreck. This type of trading is gambling, not investing. Get sucked up in it, and you'll lose more than money- you may also lose the love and respect of your family and friends.