People think fundamentals, news, financial performance, or chart patterns matter. But none of it does.
Markets are driven purely by supply and demand. And in this case, supply and demand for the stock itself.
Fundamentals are already priced in. Financial performance is already priced in. Expectations are priced in, and others probably have more information than you anyway. Other people also watch chart patterns and place their bets based on that.
What you're betting on is whether the market is right, or wrong. Or whether other investors will think the market is right or wrong.
Edit - the other part of it is that Wall Street firms hire tons of people who are incredibly smart, have math, economics and finance degrees or even PhDs, hire software engineers and spend hundreds of millions on infrastructure just to know the market better than you. You're not smarter than all those people put together.