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There is much easier and reliable method:
dt = LastValue( DateTime() );
if( StaticVarGet( "lastdt" ) != dt )
{
_TRACE("New bar");
StaticVarSet("lastdt", dt );
}
(Note that it works only if Tools->Preferences->Intraday is set
to show START or END time of interval).
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "Yofa" <jtoth100@xxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, March 17, 2009 1:03 PM
Subject: Re: [amibroker] Re: Testing for new bar using string manipulation and quotation time
> Hi,
>
> barTime % 100 == 0 will not work reliably! If there is no new tick or no CPU
> time to do refresh it will skipp new bars a few times!
> This is a common problem. Look for similar posts here. You will fined code
> samples.
>
> Y
> --------------------------------------------------
> From: "Mike" <sfclimbers@xxxxxxxxx>
> Sent: Tuesday, March 17, 2009 4:04 AM
> To: <amibroker@xxxxxxxxxxxxxxx>
> Subject: [amibroker] Re: Testing for new bar using string manipulation and
> quotation time
>
>> If you have any concerns about rounding, you could use AlmostEqual instead
>> of "==".
>>
>> http://www.amibroker.com/guide/afl/afl_view.php?id=301
>>
>> Mike
>>
>> --- In amibroker@xxxxxxxxxxxxxxx, "ozzyapeman" <zoopfree@xxx> wrote:
>>>
>>> Thanks a bunch, Mike. Modulo's so much simpler!
>>>
>>>
>>> --- In amibroker@xxxxxxxxxxxxxxx, "Mike" <sfclimbers@> wrote:
>>> >
>>> > Again, assuming that your approach is sound, better still would be to
>>> > use the modulo operator.
>>> >
>>> > barTime = 103731;
>>> >
>>> > if (barTime % 100 == 0)
>>> > _TRACE( "New bar found" );
>>> >
>>> > Mike
>>> >
>>> > --- In amibroker@xxxxxxxxxxxxxxx, "Mike" <sfclimbers@> wrote:
>>> > >
>>> > > Without commenting on the validity of the approach (I am not a real
>>> > > time trader), I can suggest that your problem is coming from a
>>> > > formatting incompatibility.
>>> > >
>>> > > Add a format clause indicating zero decimal places and it will work
>>> > > fine.
>>> > >
>>> > > Note too that your switching back to a number again is redundant and
>>> > > even error prone since "==" is not necessarily exact when dealing
>>> > > with floats. Just use the string manipulation directly.
>>> > >
>>> > > barTime = 103731;
>>> > > barTimeStr = NumToStr( barTime, 6.0 );
>>> > >
>>> > > if ( StrRight( barTimeStr, 2 ) == "00" )
>>> > > _TRACE ( "New bar found" );
>>> > >
>>> > > Mike
>>> > >
>>> > > --- In amibroker@xxxxxxxxxxxxxxx, "ozzyapeman" <zoopfree@> wrote:
>>> > > >
>>> > > > Hello, hoping someone can help out with this string conversion
>>> > > > problem.
>>> > > >
>>> > > > In live trading, I am pulling quotation time using TimeNum(), and
>>> > > > want
>>> > > > to test for the start of a new bar. So my thinking is to simply
>>> > > > convert
>>> > > > the time to a number, extract the last two characters, convert back
>>> > > > to a
>>> > > > number and see if it equals 0. If so, that means the last two
>>> > > > digits in
>>> > > > the quotation time are "00" and hence we are at the start of a new
>>> > > > bar.
>>> > > >
>>> > > > However, the sample code below is always thinking we have a new bar
>>> > > > whether the time is, for e.g. :
>>> > > >
>>> > > > 10:37:31 or
>>> > > > 10:37:00
>>> > > >
>>> > > > Obviously, only the second time should trip the 'new bar' print.
>>> > > > But
>>> > > > instead, both do:
>>> > > >
>>> > > >
>>> > > > barTime = 103731; // we would normally use TimeNum() here,
>>> > > > but
>>> > > > using a number for example
>>> > > >
>>> > > > barTimeStr = NumToStr(barTime);
>>> > > >
>>> > > > NewBarSeconds = StrToNum ( StrRight(barTimeStr, 2) );
>>> > > >
>>> > > > printf("NewBarSeconds = " + NewBarSeconds);
>>> > > >
>>> > > > if (NewBarSeconds == 0)
>>> > > >
>>> > > > printf(" We have a new bar");
>>> > > >
>>> > >
>>> >
>>>
>>
>>
>>
>>
>> ------------------------------------
>>
>> **** IMPORTANT PLEASE READ ****
>> This group is for the discussion between users only.
>> This is *NOT* technical support channel.
>>
>> TO GET TECHNICAL SUPPORT send an e-mail directly to
>> SUPPORT {at} amibroker.com
>>
>> TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
>> http://www.amibroker.com/feedback/
>> (submissions sent via other channels won't be considered)
>>
>> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
>> http://www.amibroker.com/devlog/
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>
>
> ------------------------------------
>
> **** IMPORTANT PLEASE READ ****
> This group is for the discussion between users only.
> This is *NOT* technical support channel.
>
> TO GET TECHNICAL SUPPORT send an e-mail directly to
> SUPPORT {at} amibroker.com
>
> TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
> http://www.amibroker.com/feedback/
> (submissions sent via other channels won't be considered)
>
> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> http://www.amibroker.com/devlog/
>
> Yahoo! Groups Links
>
>
>
------------------------------------
**** IMPORTANT PLEASE READ ****
This group is for the discussion between users only.
This is *NOT* technical support channel.
TO GET TECHNICAL SUPPORT send an e-mail directly to
SUPPORT {at} amibroker.com
TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
http://www.amibroker.com/feedback/
(submissions sent via other channels won't be considered)
For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/
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