system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do stock traders determine how the price of a stock would fluctuate in the course of a day?

I've seen people who purchase and sell stocks the same day, how do they do that? How do they gather information at such a limited time and still manage to gain profit?
gpt
I’m gonna give you a honest answer... a lot of the time it’s a hunch. Of course it’s based on the stocks history, what’s going on currently in the company... things like that. But a lot of it is a guess based on a gut decision.