Gambling is pure chance.

There are several different types of trading:

1. Buy and Hold. Long term traders who are actually more investors. They buy and hold it for a few months to a few years.
2. Day trading. Short term. They buy and sell within a few days. Not very often in the same day.
3. Scalping. Usually forex, but now we them in crypto. They buy or sell within minutes or even seconds.

The traders do all sorts of technical analysis and where you see all those charts with drawings.