[amibroker] Re: Testing for new bar using string manipulation and quotation time

["ozzyapeman" <zoopfree@xxxxxxxxxxx>]

Thanks a bunch, Mike. Modulo's so much simpler!


--- In amibroker@xxxxxxxxxxxxxxx, "Mike" <sfclimbers@xxx> 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");
> > >
> >
>




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