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Tomasz,
I'm already doing that. That was not the problem. I've provided a
concrete example in message #114489 which is a continuation of my
original message (#114449). Ed has offered a proposal that looks very
promising, in message #114494.
I will continue working against Ed's suggestion. If you have a moment
to review Ed's suggestion (#114494), and let us know if there is a
cleaner approach, that would be appreciated. This might interest you
as an enhancement request for the product.
Thanks,
Mike
--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx>
wrote:
>
> You should simply include LIMIT order in actual trading rules:
>
> LimitPrice = ... your limitprice
>
> Buy = YourOriginalBuyRule AND Low <= LimitPrice;
> BuyPrice = Min( Open, LimitPrice );
>
> Then you will simply have signals for symbols that actually
> get filled because BOTH your condition and price limit have been
met.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "sfclimbers" <sfclimbers@xxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Monday, August 27, 2007 10:50 AM
> Subject: [amibroker] Re: I'm having a hard time explaining this
>
>
> > Thanks for your reply. I will defer further discussion on this to
my
> > main thread #114449. Except to say that the CBI doesn't seem to
be
> > enough either, since there will not be any signals for the
symbols
> > upon which I did place a limit order, but which did not result in
a
> > fill (due to adverse price action). The end result is that I do
not
> > seem to have the scores of the other candidates with which to
make
> > the comparrison and zero out the "false" fills, as expanded upon
in
> > the above thread.
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "gp_sydney" <gp.investment@>
> > wrote:
> >>
> >> I'm not entirely sure I understand what you are trying to do,
but I
> >> think the custom backtester interface will let you do it. In the
CBI
> >> you can scan all available signals before the trades are made and
> >> change parameters for them, including setting the position size
to
> >> zero so that they'll never be taken.
> >>
> >> Since you're trying to rank signals across multiple stocks, and
> >> discard some after a certain number have been selected, I'm not
sure
> >> you'll be able to do it in normal AFL code alone as that code
only
> >> relates to a single symbol at a time.
> >>
> >> Regards,
> >> GP
> >>
> >>
> >> --- In amibroker@xxxxxxxxxxxxxxx, "sfclimbers" <sfclimbers@>
wrote:
> >> >
> >> > ts,
> >> >
> >> > Did you ever get an answer to this question? I believe that
I've
> > run
> >> > into the same issue as posted in #114449
> >>
> >>
> >> > http://finance.groups.yahoo.com/group/amibroker/message/114449
> > which
> >> > might present the case a little more clearly. I would have
> > thought
> >> > that this would be a common request.
> >> >
> >> > Thanks
> >> >
> >> > --- In amibroker@xxxxxxxxxxxxxxx, "techsmart" <mric@> wrote:
> >> > >
> >> > >
> >> > > Maybe someone here can help.
> >> > >
> >> > > PositionScore alone will not do what I want.
> >> > >
> >> > > The day before trade entry I scan for POTENTIAL entries. I
get
> > up
> >> > to
> >> > > 40 or 50 signals. On the next day I use a limit order a
> > certain
> >> > > percentage below the prior day close as an entry. However,
I
> > do
> >> > not
> >> > > want to end up with too many buys, so I rank the potential
> > entries
> >> > by
> >> > > ROC(C,40) and take the top 'x'(usually about 5 to 10) number
of
> >> > > signals and enter them as limit orders. This way I can be
sure
> > to
> >> > > not overextend my equity. Of those limit orders I can have
> >> > anywhere
> >> > > from 0 to all filled.
> >> > >
> >> > > I have the system worked out in the AB backtester except
that
> >> > > PositionScore and MaxPositions does not accurately simulate
> > what
> >> > > really happens. Using these filters, will result in the
system
> >> > > taking the 'x' number of entries with the highest ROC
amongst
> > all
> >> > > those that got hit. This is not reality, but based on the
EOD
> > data
> >> > > on the day of entry.
> >> > >
> >> > > What I need is to have the backtester take all the signals
and
> > then
> >> > > RANK them by ROC(C,40) and then take the top 'x' (say 5 or
10)
> > and
> >> > > use those as the basket to trade the next day. Of those 'x'
> > number
> >> > > of signals, anywhere from 0 to x may be entered, but this
will
> > be a
> >> > > realistic backtest...just as I trade the system.
> >> > >
> >> > > Below is an exchange with AB support. I have not made clear
> > what I
> >> > > am trying to do, but maybe it will help explain it.
> >> > >
> >> > > In sum: I want to rank all signals by some filter factor
and
> > then
> >> > > take the top 'x' number to use as potential buys the next
day,
> >> > > discarding all those that fall below a certain RANK. Hard
> > cutoffs
> >> > > will not give me a specific number of signals. For
instance,
> > if I
> >> > > used ROC(C,40) > 20, some days I would get no signals and
other
> >> > days
> >> > > I might get 30.
> >> > >
> >> > > Anyone know how this might be done?
> >> > >
> >> > > I think the 'for' loop might do, but not sure.
> >> > >
> >> > > ts
> >> > >
> >> > > ---------------------------
> >> > > Marcin,
> >> > >
> >> > > I did not make myself clear.
> >> > >
> >> > > If you have signals the day before and a group of possible
> > entries
> >> > > that are
> >> > > entered intraday THE NEXT DAY with a limit order, using
> >> > PositionScore
> >> > > and
> >> > > MaxPositions does not simulate reality. Using that method,
the
> >> > > backtester
> >> > > will take the top x number of trades based on PositionScore,
> > but in
> >> > > reality
> >> > > you would have no idea which trades would hit their limit
order
> >> > > first, so
> >> > > would not know until EOD which of the PositionScore ranked
> > trades
> >> > you
> >> > > would
> >> > > take.
> >> > >
> >> > > SO... the point is...
> >> > >
> >> > > I need a method to rank all the potential signals on the day
> > PRIOR
> >> > to
> >> > > entry.
> >> > > Then take x number of them (say 10) and only use those as
> > entries
> >> > on
> >> > > the
> >> > > next day.
> >> > >
> >> > > Can I do this: Take a list of symbols that pass a
filter....
> > say
> >> > > perhaps 40
> >> > > symbols, then rank them by some factor, such as ROC(C,40),
then
> > use
> >> > > only the
> >> > > top 10 (for example) as potential trades the next day. Of
> > those
> >> > 10,
> >> > > only
> >> > > the ones that hit a certain limit order would be bought.
> >> > >
> >> > > I need a way to rank and filter the signals from the day
before
> > and
> >> > > then
> >> > > strip off those below a certain rank. PositionScore does
this
> >> > after
> >> > > the
> >> > > fact...EOD on the entry day and this is not the way the
system
> >> > really
> >> > > works.
> >> > >
> >> > > Hope I am expressing myself clearly. I know it is confusing.
> >> > >
> >> > >
> >> > >
> >> > > Subject: Re: [#16654] Ranking signals for possible entry the
> > day
> >> > > before
> >> > >
> >> > >
> >> > > > Helo,
> >> > > >
> >> > > > You can use PositionScore variable in your formula and
define
> > the
> >> > > criteria
> >> > > > you use.
> >> > > > (and combine it with the Maximum open positions limit)
> >> > > >
> >> > > > See:
> >> > > > http://www.amibroker.com/guide/h_portfolio.html
> >> > > >
> >> > > >
> >> > > > Best regards
> >> > > >
> >> > > > Marcin Gorzynski
> >> > > > Amibroker.com Technical Support
> >> > > >
> >> > > > Subject: [#16654] Ranking signals for possible entry the
day
> >> > before
> >> > > >
> >> > > >
> >> > > > First let me say that Amibroker is a wonderful tool for
> > system
> >> > > development
> >> > > > and backtesting. I've used many others and find that
> > Amibroker
> >> > has
> >> > > all
> >> > > > the
> >> > > > capabilities I've been looking for. I've already given
you a
> >> > > favorable
> >> > > > review on the Elite Trader message board and will continue
to
> >> > > recommend
> >> > > > your
> >> > > > software to others. It's very capable and FAST! Thanks!
> >> > > >
> >> > > >
> >> > > > V. 4.65.2
> >> > > >
> >> > > > My question:
> >> > > >
> >> > > > My system finds potential signals on the day before
entry.
> > There
> >> > > may be
> >> > > > anywhere from 0 to 50 potential signals on any one day.
> >> > > >
> >> > > > Entries are made the NEXT day on a limit order. So, I
cannot
> > be
> >> > > sure how
> >> > > > many of those limit orders will be hit. I can simply
limit
> > the
> >> > > number of
> >> > > > orders I submit, but this does not seem to be a very good
way
> > to
> >> > > backtest
> >> > > > and does not simulate what I do in reality. In testing I
> > have
> >> > > found that
> >> > > > filtering on certain parameters can improve results (such
as
> >> > taking
> >> > > those
> >> > > > signals for stocks with the greatest 40 day ROC). I can
test
> >> > this
> >> > > in the
> >> > > > backtester with the portfolio option using positionscore,
but
> >> > this
> >> > > is
> >> > > > unrealistic, because there might have been 20 limit orders
> > hit
> >> > > intraday
> >> > > > and
> >> > > > the backtester will take the 2 (or whatever
MaxOpenPositions
> >> > number
> >> > > I have
> >> > > > specified) with the best ROC, something I would not have
been
> >> > able
> >> > > to
> >> > > > predict intraday when limit orders are getting hit at
various
> >> > > different
> >> > > > times.
> >> > > >
> >> > > > What I would like to do is this: On the day before entry
> > (the
> >> > > signal
> >> > > > day),
> >> > > > I would like to be able to rank all the possible signals
by
> > some
> >> > > factor,
> >> > > > such as 40 day ROC. This still leaves some uncertainty
about
> > how
> >> > > many
> >> > > > actual entries you'll get, but it would prevent the
> > backtester
> >> > from
> >> > > doing
> >> > > > something that couldn't be done in reality and would put
an
> > upper
> >> > > limit on
> >> > > > the number of trades taken.
> >> > > >
> >> > > > So...to summarize:
> >> > > >
> >> > > > Can the backtester take all the potential signals on day -
1
> > and
> >> > > rank them
> >> > > > according to some factor (say, ROC(C,40)) and then just
use a
> >> > > limited
> >> > > > subset
> >> > > > of all the signals to use as actual limit orders on the
next
> >> > day.
> >> > > Hard
> >> > > > cut-offs, like ROC(C,40) > 20, don't work because that can
> > give
> >> > you
> >> > > many
> >> > > > signals one day and none the next. What is needed is a
> > relative
> >> > > ranking
> >> > > > or
> >> > > > scoring, so that the backtester will only take, for
example,
> > the
> >> > 5
> >> > > stocks
> >> > > > with the highest ROC40, all the others being discarded.
> >> > > >
> >> > > > I think the 'for loop' may be the way to do this, but I'm
not
> >> > > skilled
> >> > > > enough
> >> > > > to be able to sort it out.
> >> > > >
> >> > > > Thanks very much for your help and for a great trading
tool.
> >> > > >
> >> > >
> >> > > >
> >> > > >
> >> > >
> >> >
> >>
> >
> >
> >
> >
> > Please note that this group is for discussion between users only.
> >
> > To get support from AmiBroker please send an e-mail directly to
> > SUPPORT {at} amibroker.com
> >
> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> > http://www.amibroker.com/devlog/
> >
> > For other support material please check also:
> > http://www.amibroker.com/support.html
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
>
Please note that this group is for discussion between users only.
To get support from AmiBroker please send an e-mail directly to
SUPPORT {at} amibroker.com
For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/
For other support material please check also:
http://www.amibroker.com/support.html
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