RE: [amibroker] Detecting New Bar

["J. Biran" <jbiran@xxxxxxxxxxx>]

Hi,

 

I am trying to understand how this function works, I may be able to adopt this approach.

 

The help does not make it clear, does DateTime()return  the time stamp of the bars
or just system date/time?

 

would this function work for tick and volume bars too?

thanks,
Joseph Biran
____________________________________________

 

 

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From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of Ara Kaloustian
Sent: Saturday, April 01, 2006 7:58 AM
To: amibroker@xxxxxxxxxxxxxxx
Subject: Re: [amibroker] Detecting New Bar

Thanks Herman

I was trying to eliminate use of 
LastValue(), but the structure you provided
should allow me to do 
that.
Putting it in a function is an extra bonus.

I beleive this 
modification should work.

> function NewBar()
> 
{
LastDateTimeValue = DateTime();

> PrevDateTimeNum   = 
StaticVarGet("DateTimeNum");
> LastDateTimeNum   = 
LastDateTimeValue[BarCount-1];
> 
StaticVarSet("DateTimeNum",LastDateTimeNum );
> return PrevDateTimeNum != 
LastDateTimeNum;
> }

----- Original Message ----- 
From: "Herman 
van den Bergen" <psytek@xxxxxxxx>
To: 
<amibroker@xxxxxxxxxxxxxxx>
Sent: Saturday, April 01, 2006 2:13 
AM
Subject: RE: [amibroker] Detecting New Bar


> function 
NewBar()
> {
> PrevDateTimeNum = 
StaticVarGet("DateTimeNum");
> LastDateTimeNum = 
LastValue(DateTime());
> StaticVarSet("DateTimeNum",LastDateTimeNum 
);
> return PrevDateTimeNum != LastDateTimeNum;
> }
>
> 
-----Original Message-----
> From: amibroker@xxxxxxxxxxxxxxx 
[mailto:amibroker@xxxxxxxxxxxxxxx]On
Behalf
> Of Ara Kaloustian
> 
Sent: Friday, March 31, 2006 11:45 PM
> To: AB-Main
> Subject: 
[amibroker] Detecting New Bar
>
>
> I use the code below to 
detect when a new bar is started, so that I
process
> some indicators 
only once per bar in order to decrease CPU load.
>
> The code below 
uses LastValue() function (which is slow). I would like to
> replace it 
with Close[BarCount-1] ..., but can not quite figure out 
how
...
>
> My concern is that Quick AFL keeps changing the 
number of bars loaded as
> time goes on, so I am not sure what the impact 
is.
>
> Anyone see a way out?
>
> Thanks
>
> 
Ara
>
> //Detect New Bar
> //Variables: NewBar
> 
//
>
> if (IsNull(StaticVarGet("Lastbar")))
> {
> 
StaticVarSet("Lastbar",0);
> }
>
> //Detect New bar
> 
//Use to start routines at start of new bar
> //
> NewBar = 
False;
> if (StaticVarGet("Lastbar")!=LastValue(BarIndex()))
> 
{
> NewBar = True;
> 
StaticVarSet("Lastbar",LastValue(BarIndex()));
> }




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