// percentage of a variable within a band
var percent(var a,var l,var h) { 
	if(l == h) return 50.;
	return 100.*(a-l)/(h-l); 
}

// Bollinger Bands Oscillator
var BBOscDeluxe3000(var* Data,int Period,var NbDev)
{
	var basis = Laguerre(Data, .5); // random alpha, no ideas
	var dev = StdDev(Data, Period);
	
	var upper = basis + dev*NbDev;
	var lower = basis - dev*NbDev;
	return percent(Data[0],lower,upper);
}