The technology essential for real-time stock trading is low-latency trading platforms, which enable immediate execution of financial transactions. These platforms utilize advanced algorithms and high-speed data feeds to provide traders with timely market information and order execution. Technologies such as Application Programming Interfaces (APIs) and algorithmic trading allow for automated buy and sell orders based on market conditions. Furthermore, cloud computing enhances the scalability and accessibility of trading tools, ensuring traders can operate effectively from various locations. This instantaneous processing capability is vital for capitalizing on market fluctuations.