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Ken,
As new RT data arrive - old arrows are not longer valid.
Why? Just imagine that the 1 minute bar was added just recently
(10 seconds ago) and it caused that (for example)
Cross( C, EMA( C, 10 ) ) has generated a "Buy signal".
Now new data arrive and this signal is invalidated because
price is not above moving average anymore.
So the arrow is not valid anymore.
Second example: a new data bar is added but the arrows
remain in place - again wrong.
Why 3 seconds - simply because charts are refreshed automatically
every 3 seconds if you are running RT feed. During that time display
of arrows and chart is fully synchronized and valid.
Now - is it elegant?
You may say it is not and I can agree, but the problem mentioned
above needed to be fixed.
An alternative is to re-evaluate your formula with each refresh
(in fact this is how Commentary window works right now).
The problem is that re-evaluation of every formula causes additional load to the CPU, and
I have to consider such changes very carefully because
it may affect the RT performance of the whole system.
This is somewhat tricky subject and maybe I will come up with a
better solution soon. Anyway - right now you can use Commentary window
to get arrows constantly updated.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "Ken Close" <closeks@xxxx>
To: "Tomasz Janeczko" <tj@xxxx>
Cc: "AmiBroker List" <amibroker@xxxxxxxxxxxxxxx>
Sent: Thursday, July 25, 2002 5:22 PM
Subject: [amibroker] RE: Trade Arrows
> Tomasz:
>
> Thanks for the reply. This is one of the first examples that **I** have run
> across that is a decided negative and will cause loss of efficiency. I guess
> that is preferrable to incorrect results, but I thought the arrows displayed
> previously were "correct". Is it not just some time delay in your display
> routine?? Why does showing them for only 3 seconds make them accurate but
> allowing them to stay indefinitely make them (or some) incorrect? I suspect
> the answer is too deep for me to understand or you to take the time to
> write, but it is an nonelegant solution to whatever the problem was/is.
> Any chance of doing something to fix it?? (I guess you would have if you
> could.)
>
> So now all systems must have duplicate formulas in the commentary window,
> which must be open.
>
> Oh, well. You still have my utmost admiration and support, but if someone
> did not gently complain at all (like this), you would think something was
> wrong.
>
> So long,
>
> Ken
>
> -----Original Message-----
> From: Tomasz Janeczko [mailto:tj@x...]
> Sent: Thursday, July 25, 2002 11:08 AM
> To: Ken Close
> Subject: Re: Trade Arrows
>
>
> Ken,
>
> Unfortunatelly this was desired change. Otherwise false arrows were
> generated.
> To get arrows dislayed all the time and updated correctly you would
> need to copy the formula to Commentary window.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "Ken Close" <closeks@xxxx>
> To: <bugs@xxxx>
> Sent: Thursday, July 25, 2002 5:03 PM
> Subject: Trade Arrows
>
>
> > Tomasz:
> >
> > My apologies if this is fixed with some setting that I do not know about.
> >
> > I have just opened 4.07.1 and in RT, the trade and raw arrows only stay
> > displayed for about 3 seconds after right clicking.
> >
> > Please let me know if this is something I should be able to fix or if you
> > must adjust the code.
> >
> > Thanks,
> >
> > Ken
> >
> >
> >
> >
> >
>
>
>
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
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