Assessing the business cycle is essential to understand economic fluctuations and to develop appropriate economic policies. Byond Research estimates the business cycle based on an algorithm that is relatively simple to implement and robust to noise and anomalies in economic data. Our method provides a clear identification of the phases of business cycles, which is useful for analysis and decision-making. Many economic institutions, such as the National Bureau of Economic Research (NBER) in the United States, use methods based on this algorithm to determine business cycles.