Thousands of other investors do day trading from computers in their homes.
A day trader watches stock prices carefully. When he sees a stock rise in price, he uses the computer to buy shares of the stock.
If the stock continues to rise in price in the next few minutes, the day trader sells the shares quickly to make a small profit.
Then he looks for another stock to buy. If a stock goes down instead of up, he sells it and accepts the loss.
The idea is to make a small profit many times during the day.
Day traders may buy and sell stocks hundreds of times each day.
Many day traders lose all their money in a week or so.
Only about thirty percent succeed in earning enough from their efforts to continue day trading.