I would like to add an indicator line to an intraday chart that is 10% below the DailySMA(close,10).

[Fin McLen]

I would like to add an indicator line to an intraday chart that is 10% below the DailySMA(close,10). Ideally I'd just like to have it sit under today's DailySMA(close,10) but would be OK with it extending to the right.

Here is what I have so far... but it's not working.

def D_SMA99 = (DailySMA(FundamentalType.CLOSE, 10,  AggregationPeriod.DAY)) * 0.99;

input showOnlyLastPeriod = yes;
  input BeginNumOfPeriodsBack = 0;
  input EndNumOfPeriodsBack = 0;
  def BeginningPeriod = Close(period =aggregationPeriod.Day)[-BeginNumOfPeriodsBack-1];
  def EndingPeriod = Close(period = aggregationPeriod.Day)[-EndNumOfPeriodsBack];

plot data;
data = if ShowOnlyLastPeriod and !IsNaN(EndingPeriod) and IsNaN(BeginningPeriod)
        then D_SMA99 else 0;
data.SetDefaultColor(color.RED);
data.Setstyle(curve.FIRM);

addlabel(yes,concat("10SMA x 99% = ",D_SMA99),color.RED);

Thank you,
Louise