When checked the formula will be automatically used to calculate the user priority. The formula is in the form of <first number>;<second number>. The first number is a factor that will be multiplied by the 1/(Upload/Download ratio), the second number will be multiplied by 1/(Upload#/Download# ratio) and then both will be added to obtain the final number. Therefore, the priority will be obtained by the formula <first number>*1/(Upload/Download ratio)+<second number>*1/(Upload#/Download# ratio). It is necessary to invert the ratio since the priority 0 is the “highest” priority. The two number can and should be used as scaling factor to give either more or less importance to each the Upload#/Download# or Upload/Download ratio. For example a formula of 0.5;0.5 would give as much importance to each ratio. This is useful since the Upload#/Download# is always accurate because it comes from the logs whereas the Upload/Download is calculated with the file size and if the bot doesn't have the necessary information this ratio will not be as accurate as the Upload#/Download# ratio. To use directly only one of the ratio as the priority simply use the formula 0;1 or 1;0.