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Thanks for that hc, but, as you say, like PushPOP it doesn't work with
historical data so it would be no use for backtesting.
Ian
> Ian,
>
> Thanks for sharing the information on PushPop.
>
> For tick chart, one may try Global Variable DLL posted
> at www.tradestationworld.com. The example provided was a tick chart.
> All Forums
> Strategies & Other Analysis Techniques (ELD Files)
> TradeStation Compatible DLLs
> Global Variable DLL
>
> However, be very careful with it. It has its limitations too.
> Among them are:
> * Does not work on history. Just the latest.
> * There is still some data mismatch. Mark Mills at TS did
> some test and posted it at www.tradestationworld.com.
> I could not locate the posting link now. I tried it out on some
> daily,
> 30 min and 3 min charts after market (not in real time).
> Somehow, the updated data does not always come through between
> the indicators. Mark suggested that "This miss-matching of data is
> produced by the independence of charting activities." Because of the
> mismatch, I personally decided not to use it.
>
> Does anyone have experience with Global Variables Professional
> by www.investlabs.com? Does it overcome the above limitations?
>
> hc
>
> -----Original Message-----
> From: Ian Waugh [mailto:ianwaugh@xxxxxxxxx]
> Sent: Sunday, April 20, 2003 5:24 PM
> To: omega-list@xxxxxxxxxx
> Cc: ianwaugh@xxxxxxxxxxxxxxxxxxx
> Subject: Re: Pushin' and Popin' Ticks...
>
>
> Further to this question, I've had an email from Jan Philipp re an
> email rom Dave Nadeau and both give permission to copy it to the list.
>
> It appears that I cannot do what I would like to do, at least not
> with historical data, which makes PushPOP unsuitable for backtesting
> at the tick level. If anyone knows of a way around this I'd love to
> hear from them...
>
> Ian
>
>
> J> does Pushpop.dll work both, in real-time and historically?
> J> We used to have problems with some dlls with
> J> historical transfers until we started using GlobPro.
>
> It does work with both historical and realtime data.
> However, it does work differently. As data comes in tick by
> tick, the plotted pushpop indicator will record every tick
> and move incrementally. I assume this is the result of the
> ticks being aligned within the arrays in which pushpop is
> storing them.
>
> On the other hand, if you should take that same tick data
> and load it from the database to do some historical testing,
> you'll see that the indicator changes it's value only once
> per minute on tick charts. I assume that this is the result
> of Tradestation's time resolution going down only to the
> minute level, so there's no way for pushpop to definitely
> align the information except at each one minute interval.
>
> So, I would caution anyone against backtesting tick charts
> using a pushpop'ed indicator as your results will certainly
> be different. I think that the closest you can come would be
> on using 1 minute bars.
>
> --
> Dave Nadeau
> Fort Collins, CO
>
>
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