Indicator code execution

["cpescho" <cpescho@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Im working on some seasonal indicator but had problems with it.
I stripped the code to the problem related part, see below.
It counts the number of years within a symbol. As soon as i click
on apply indicator it displays the correct year count, but then
everything disappears and the yc is set back to 1. Looks like
the code is executed twice for some reason. Any help?

yc = 0; //Yearcount
yeer = Year();
for(i=1; i<BarCount; i++) {
	if(yeer[i] != yeer[i-1]) {   // year change
		yc++;
		printf("yc %f", yc);
	}
}