Hi guys,
I am just starting with Zorro and I am sorry for such a silly question.

I have been trying to code Instantaneous Trendline indicator from Ehler's Cybernetic Analysis book and I am unfortunately still getting screwed output... :-/ Could you please have a look on my code and advise me what I am doing wrong?

Instantaneous Trendline formula in EasyLanguage from Ehler's book:

Code:
InstTrend = (α − (α/2)2) * Price + (α2/2) * Price[1]
− (α − 3α2/4) * Price[2]) + 2 * (1 − α)
* InstTrend[1] − (1 − α)2 * InstTrend[2];


My Zorro script:

Code:
var Alfa = 0.05;
var ITrend[4];

function run()

{

StartDate = 2012;
EndDate = 2013;
BarPeriod = 1440;

var* Price = series(price());

//Fill Instantaneous Trendline at time 0, 1 and 2 with some 
//values in the beginning of the testing period.

if (Bar < 4)
{
	ITrend[0] = (Price[0] + 2 * Price[1] + Price[2])/4;
	ITrend[1] = (Price[1] + 2 * Price[2] + Price[3])/4;
	ITrend[2] = (Price[2] + 2 * Price[3] + Price[4])/4;
	}
else
{

// Formula for Instantaneous Trendline itself after Bar 3.

	ITrend[0] = (Alfa - Alfa * Alfa/4)*Price[0] + 0.5 * Alfa * Alfa * Price[1] - (Alfa - 0.75 * Alfa * Alfa)*Price[2]+2*(1-Alfa)*ITrend[1]-(1-Alfa)*(1-Alfa)*ITrend[2];
}


// Plot ITrend value

plot("ITrend",ITrend[0],0,RED);

// Plot ITrend values at time 0, 1 and 2 for troubleshooting.

plot("ITrend0",ITrend[0],NEW,RED);
plot("ITrend1",ITrend[1],0,BLUE);
plot("ITrend2",ITrend[2],0,YELLOW);

set(PLOTNOW);
	
}

The problem obviously is that value of ITrend[1] and ITrend[2] remains constant from the beginning of the test period. I really don't understand why, because I think that every new run of run function after the new bar should shift the values of ITrend...

Thank you very much for your help in advance,

zcom001