## Understanding the Population Standard Deviation Formula

Population standard deviation is a measure of variation in the values of a set of data, calculated as the square root of the variance of the set. It is commonly used as a measure of risk in the Forex market, as it provides information about potential market volatility. The population standard deviation formula can be calculated by taking the square root of the sum of squared-differences between each score and the mean, divided by the population size. This measure can be used to assess how much variation there is in a set of data and can help traders make more informed decisions when trading Forex.