As an expert in finance, it's important to understand the concept of guaranteed orders and how they work. When an order is guaranteed, it means that it will be fully executed upon entry. This is made possible by Registered Traders who will step in to provide the necessary stock if the book falls below the required limit. However, it's worth noting that not all orders are eligible for this guarantee. To qualify for the Minimum Guaranteed Fill, an order must be a tradable client order with a volume that falls within the MGF size, which can vary depending on the stock in question.