The Investment Strategy Simulator is an online tool that helps users understand the performance of various investment strategies under different market conditions by simulating different stock price models and investment strategies. It employs the Geometric Brownian Motion model to simulate continuous random fluctuations in stock prices, making it suitable for relatively stable blue-chip stocks. Users can customize different investment periods and strategies, such as buy-and-hold or dollar-cost averaging, to observe changes in investment returns. The main advantage of this tool is its simplicity and accessibility, allowing investors to learn and compare different investment strategies without incurring actual risks. It is ideal for long-term investors who remain calm and unaffected by short-term market fluctuations. Currently, this product is free, primarily aimed at educational and entertainment purposes, and does not constitute actual investment advice.