Proportional Grid EA v1.20 MQ5 operates on the principle of grid trading, which involves placing buy and sell orders at predetermined intervals around a set price, creating a grid-like structure. This trading strategy capitalizes on price fluctuations, allowing traders to profit from both upward and downward movements. The key feature of the Proportional Grid EA lies in its adaptability and ability to manage trades efficiently, making it an excellent choice for both novice and experienced traders looking to enhance their trading performance.