How to do research on companies to see if they are worth investing into
There are two types of ways to do research on a company: technical and fundamental. These work in a sort of spectrum.
Technical analysis is typically more short term, relying heavily on quantitative data, margins, options etc in order to determine if a stock will go up or down.
Fundamental analysis is more long term, primarily focusing on the quality of the company. What their goal is, how are they achieving it, who is running it, etc.