To convert a broker deposit bonus into cash, you typically need to meet specific trading volume requirements set by the broker. For instance, you might need to trade a certain number of lots, such as 75 or 100, depending on the broker's terms. Once you've reached the required trading volume, the bonus credit is converted into cash that you can withdraw. Keep in mind that this process can take a significant amount of time and trading activity, especially for smaller accounts, so it's important to consider whether the effort to meet these requirements is worth the potential benefits of the bonus.