Even though stock market is always a risky place to earn money, a lot of people still risk their money on it. Warren Buffett, the richest man in the world in 2008, is one of the success stories on stock market. These reasons make stock market the main focus of businessmen all around the world. Many efforts have been made to explore the possibilities of making money in stock market. Most of the people try to make predictions, while other scientists try to apply their ideas in stock market. One of the ideas is the software agent. This will be the focus of this book. Software agents can act automatically based on changes of the environment. Software agents can help people make the decision to buy or sell the stock. This book explores the possibility of using Agents in the stock market by creating a simulation. The agent will use technical analysis and combination of simple algorithm. The agent will show that simple algorithms are already enough to gain money in stock market.