Display single value as text.

I have written a script (we copied bits from here and there and added something of my own).

But I am having an issue with the output.  Basically the indicator plots two plots on a symbol, but I want the second plot to only display its las value as text.  I can get it to display as text, but I get every value.

I created the script this way as I wanted the same time frame applied to both plots (I also couldn't work out how to use the timeframe specified in one indicator in another without having to set it each time I applied it)

Any assistance would be appreciated

Here is my last effort:

[target=Price; category=Moving Average]

expr := expression("Expression");

method := inputma("Method",SIMPLE);

n := input("Time periods",14,1);

res := ma(expr,n,method);

[linestyle=Solid; color=Red] 

res;

[linestyle=hidden; visible=no]

ResNow := Res;

Res52W := ref(res,-52);

Change := ResNow - Res52w;

ROARtxt := 100*(Change/ResNow);

ROARtxt;

[linestyle=text; visible = yes; colour = blue]

lastROAR:= lastvalue(ROARtxt);

lastROAR;close

Thanks for the pointer.  I managed to get it to work with a bit more tweaking.

Below is the code:

{Moving Average Calculation}

[target=Price; category=Moving Average;]

expr := expression("Expression");

method := inputma("Method",SIMPLE);

n := input("Time periods",14,1);

res := ma(expr,n,method);

[linestyle=Solid; color=Red]

res;

{Alan Hull's ROAR calculation for best fit Moving Average}

[linestyle=hidden; visible=no]

ResNow := Res;

Res52W :=ref(res,-52);

Change := ResNow - Res52w;

ROARtxt := 100*(Change/ResNow);

{This part displays the ROAR as a percentage}

a:=IF(systemdate=Systemdate ,RoarTxt, Undefined);

[linestyle=Text; textalign=Above,Left; target=price;visible=yes]

if(barnumber=lastvalue(barnumber), Round(a,2) + "%", undefined);High;