Whilst some day traders are tuned in every day from 09:30 to 16:30 EST (for the U.S stock market), many trade for just a 2-3 hour window instead. As a beginner especially this will prevent you making careless mistakes as your brain drops down a couple of gears when your concentration wanes. The hours you’ll want to focus your attention on are as follows:

And you can find such stocks in lists like the IBD 50, Sector Leaders, IBD Big Cap 20 and IPO Leaders. For example, fast-growing semiconductor designer and artificial intelligence (AI) stock Nvidia was featured on the IBD 50 before it surged 750%. And Apple has been featured on various IBD lists as it has made big moves in recent years. While, of course, not every stock featured on an IBD list will make the type of moves that Nvidia and Apple have made, it does show why it pays to regularly update your list of stocks to watch using these S&P 500-beating screens.
Intuitive Surgical (NASDAQ:ISRG) -- Intuitive Surgical is a healthcare company that makes surgical robots and is the clear leader in the space. There are tens of thousands of doctors trained on the company's da Vinci surgical robots and more than 4,400 of the robots installed worldwide. As more surgical applications are found for the technology, these machines become more valuable to the hospitals that own and use them.
What would make me sell: Sometimes there are good reasons to split up. For this part of your journal, compose an investing prenup that spells out what would drive you to sell the stock. We’re not talking about stock price movement, especially not short term, but fundamental changes to the business that affect its ability to grow over the long term. Some examples: The company loses a major customer, the CEO’s successor starts taking the business in a different direction, a major viable competitor emerges, or your investing thesis doesn’t pan out after a reasonable period of time.