[Calgon]

Paste the code you have for your command /makeleader and we'll be able to help you. It is only a simple if statement that is required to do what you want, but we need to know the names of your variables so we can produce the if statement for you.

If you studied mathematics (which I presume you did at some level at school) you'll probably know the difference between a greater than and lesser than sign, that's what will be used in the if statement to make sure the value entered is within your scope.