The upside potential ratio is a measure of how much of a company's stock price could go up compared to down. To calculate it, you take the price of the stock and divide it by the amount of money the company has earned over the past year. This number tells you how much the stock could potentially go up if the company's profits continue to grow. So if the upside potential ratio is high, that means the stock has a lot of potential to increase in value in the future.