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If you're interested in a 4% change, I wonder if setting an alert zig
for 2% should put you on notice that 50% of the move has already taken
place.
You may also do a stats analysis on your specific stocks with a 2%
change. Such as how many times does the changed trend continues if it
hits 2% and how far is the average.
Just a thought,
Dominick
-- In amibroker@xxxxxxxxxxxxxxx, "Dave Merrill" <dmerrill@xxxx> wrote:
> hi Phsst, think we're talking about two different things.
>
> I did ask a while back about distinguishing trending and non-trending
> markets, and did investigate ADX/DMI. (ADX/DMI seems more short term
than I
> had in mind. I was thinking about these months-long sideways
markets, how to
> numerically tell them apart from more strongly trending ones, and what
> strategies you might take to respond.)
>
> but this is a separate question: given an indicator, any indicator,
how can
> you efficiently detect when it has reversed direction by a spec'd
amount?
> any ideas?
>
> dave
>
>
> > Just a possibility...
> >
> > Take a look at ADX, +DI & -DI.
> >
> > ADX tells you if a trend is in place.
> >
> > Crossover of +DI / -DI might be a decent indicator of a change in
trend.
> >
> > I have not done any testing on this but you might want spend a little
> > time looking at it.
> >
> > phsst
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Dave Merrill" <dmerrill@xxxx>
wrote:
> > > um, unless I'm reading this wrong, it's pretty clear, as I
thought: Zig
> > > "cheats", in a way, so it can't ever be used in trading systems and
> > won't
> > > backtest realistically. am I missing something?
> > >
> > > part of me feels like I must be, or these functions wouldn't be very
> > useful
> > > in real life. jayson's post made it clearer to me how it responds,
> > but for
> > > backtesting, there doesn't seem to be any way to keep it from
> > knowing what
> > > it already knows about bars that haven't happened yet. or maybe I'm
> > missing
> > > another something.
> > >
> > >
> > > back to my original question about detecting reversals. I want
to find
> > > places where an indicator has dropped at least a specified amount
> > from its
> > > high since the last switch, or risen that amount from its low since
> > the last
> > > switch. the key thing here is finding the high since the last
rise off a
> > > low, and the low since the last drop from a high.
> > >
> > > is Zig or one of its relatives the best or only way to do this,
short of
> > > stepping through the indicator array a bar at a time?
> > >
> > > Dave Merrill
> > >
> > >
> > > > Definitive answer on Zig is included in the User's Guide, AFL
> > reference:
> > > > http://www.amibroker.com/guide/afl/afl_view.php?name=ZIG
> > > >
> > > > Caveat: this function is based on Zig-Zag indicator and may look
> > > > into the future - this means that you can get **unrealistic
> > > > results** when back testing trading system using this indicator.
> > > > This function is provided rather for pattern and trend recognition
> > > > formulas
> > > >
> > > > Best regards,
> > > > Tomasz Janeczko
> > > > amibroker.com
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