[amibroker] Still Looking for Help with Intraday Bars

[Ken Close]

I still am looking 
for some words about how to identify a given bar in Intraday mode.  I would 
like to enter a "Buy Date & Time" and have a trailing stop plotted from this 
point.  I posted my full code, in Daily mode, in another message.  I 
am trying to get the same functionality in Intraday mode.
 
I created the 
following code to help me understand things like TimeNum(), DateTime(), 
etc.  I have seen that BarIndex() changes depending on the interval 
selected.  I also notice that the quality of the data in the intraday 
database is important. I use QuoteTracker, set for 1 minute data 
gathering.  Sometimes it misses bars (esp if the application isn't running 
at the start of the market).  So the number of bars reported from BarIndex 
in 30 min mode is not double the number of bars reported in hourly 
mode.
 
Here is the test 
code I wrote.
 

Plot(C,"Close",colorRed,styleCandle);
Ix = Interval(0)/60;
T = TimeNum();
DT = DateTime();
DN = DateNum();
BI = BarIndex();
E3 = EMA(C,3);
e21 = EMA(C,21);
Up = Cross(E3,E21);
Dn = Cross(E21,E3);
Plot(E3,"E3 -- Interval 
= " + WriteVal(Ix,1.0) + 
" Min",colorBlue,styleLine);
Plot(E21,"E21 -- 
BarIndex = " + WriteVal(BarIndex(),1.0),colorRed,styleLine);
//Title = WriteVal( 
DateTimeConvert( 2, BuyDate ), formatDateTime );
Plot(Null,"TimeNum = " + 
WriteVal(DT,formatDateTime),colorWhite,styleLine);
Plot(Null,"\nDateNum() = " + 
WriteVal(DT,1.0) + "TimeNum = " + WriteVal(t,1.0),colorBlue,styleLine);
PlotShapes(Up*shapeUpArrow,colorGreen);
PlotShapes(Dn*shapeDownArrow,colorRed);
BuyDate = 442;//1061005;
On = BI == Buydate;
PlotShapes(On*shapeUpTriangle,colorAqua);
 
Can someone suggest 
a way to enter the BuyDate easily.  Right now I am thinking to display the 
bar number, then write in the code, like above, the Bar Number for the 
BuyDateTime.
 
Is there a number 
that represents the combination of the Date and Time?  If you plot the 
above code, the number showing up for DateNum is an impossibly long and non 
obvious number.
 
Any help out there 
on this issue???
 
Ken
 
 
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