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We have no qualms about implementing this in QuantStudio.
The issue is coming up with some solid logic. If someone can explain to us
what a robust implementation will be then we will go ahead and do it.
In fact we make it a point to listen to what our customers want
and rolling those features out quickly.
Thanks, Joel /SmartQuant/
> -----Original Message-----
> From: Kevin Sven Berg [mailto:ksberg@xxxxxxxxx]
>
> Max,
>
> It doesn't sound intuitive until you think about how bars are
> created. All bars, even tick bars, are bound by time. For
> instance, a 100-tick bar will have a start and an end time,
> based on when the bar is created and finished.
>
> When you combine time-based charts (minute, hour, day, week,
> etc), the program is able to align times so that multiple
> data series can be placed on a single chart. With tick bars,
> no such alignment is possible because there is no guarantee
> that ticks will line up with anything. In fact, it would be
> unusual if they did.
>
> What you're asking for is extremely non-trivial to implement,
> which is why commercial packages don't support it. Even
> trading programming packages, such as SmartQuant, don't support it.
>
> I've tried my hand at a custom implementation, and managed to
> achieve support at the data level. It requires that one data
> series become the "master", and defines the time slicing. In
> my case, I was looking at at 100-ticks of the E-mini, and
> creating a slice of the $TICK, which may have been 34 ticks
> (or some other arbitrary number). Now both series will be
> aligned so that charting is possible. You'd have to do
> something similar to support aggregation of buyers and
> sellers for every tick bar. It requires the equivalent of
> re-writing the global-server so that it can serve and mix
> time-and-sales information on the fly for any chart ...
> meaning that no data caching is possible.
>
> I didn't carry the implementation through to charting. I just
> don't believe it's worth the special effort (and it is a LOT
> of effort).
>
> Kevin
>
> At 03:34 PM 1/17/2004 -0800, you wrote:
> >I have a tick chart, based on last data for Intel. I want to look at
> >the Buyers vs. Sellers Activity Bar which requires ask and
> bid data as
> >Data2 and Data3. When I try to add those I get an error
> message "Tick
> >charts may not be mixed with other charts or activity bars". The
> >Activity bar seems to call for the other data but I can't
> put it in a
> >chart. What is up with that??
> >
> >Max
>
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