if you are talking about a canned indicator then that probable shouldnt happen atleast to the point where you cant keep wave from blowing up then and you should submit a help ticket. if it is your own custome script a divide by zero error is exactly that,,as your script is being run some where in there you are dividing a variable which equals zero..boom it will blow up..
try instead of dividing use the multiplication if you want half then multiply by .5 quarter .25 ect....or in your code you can write a line saying if some thing equals zero then make that some thing equal to 1.
that will keep you clear of that error which is user defined...
if you need any help post a code snipet and we will get on it for you.