It's important to be patient. Trade must not be excessively expanded. Frank Joe once said that any market usually has three to five trading opportunities every year, including individual stocks.
Frank is a speculator who mainly trades on medium term trends. However, his comments apply to basically every trend. If you want to.
You can throw a copper plate and decide: “go long on the front, sell short on the other” and make 100 trades every day.
But... if you do that, you have to rely entirely on luck. If you want to make a steady profit, you must watch the market you are interested in before opening a position.
You must grasp the favorable factors as much as possible.
Every market index, individual stock, and commodity has its own unique pace, rhythm, and nature.
You should only consider trading if you are familiar with the market situation, and you must wait for the right opportunity: if you make the right judgement, the profit potential is high; if you make a mistake, your losses are limited.
Watch patiently, and when you have good odds, act decisively.
On another level, if you are only trading your own account and the trading time structure is very short, you should limit the types of stocks to less than ten; as far as futures trading is concerned, you should limit the types of commodities to less than five. The most important reason is simply an attention problem.
How many phone numbers can you remember? Maybe ten or eight.
So, if you have trouble remembering phone numbers, it's also hard for you to keep an eye on ten or more trading positions at the same time.
Know your position and pay attention to the situation...