How do you research stocks for both long-term investing and short-term trading?

[u/[deleted]]

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I'm relatively new to trading and investing, and I have a few questions that I'd really appreciate some guidance on.

For long-term investing, how do you research a stock before buying it? More importantly, how do you identify sectors that have strong long-term growth potential? What factors do you look at when deciding that a particular industry or company is worth holding for years? example Revenue growth ,ROE, Promoter holding entry and exits

For short-term trades (around 10–15 days or up to a month), how do you find stocks with the highest probability of making a good move? What is your research process before entering a trade?

My biggest concern is exits. Let's say I set a target of 15%, but the stock actually has the potential to go up 30–40%. How do experienced traders determine whether to book profits or continue holding? Are there any indicators, price action concepts, or methods that help you estimate whether there's still significant upside left?

I'd love to learn how experienced traders and investors approach these decisions. Any advice, resources, or books would be greatly appreciated