// Simple ATR based on SMA
var ATRS(int Period)
{
	Period = max(1,Period);
	var vATRS =  0;
	for(g_count = 0; g_count < Period; g_count++)
		vATRS = priceHigh(g_count)-priceLow(g_count);
	return vATRS/Period;
}

vATRS += priceHigh...