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Hello,
To avoid misunderstanding:
Scan LISTS *RAW* buy/sell/short/cover signals.
Backtest shows processed TRADES.
No delays, no stops etc are applied IN SCAN MODE.
================================
Delays, stops are applied in BACKTEST MODE
=============================
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "Tomasz Janeczko" <amibroker@xxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Thursday, May 01, 2003 4:54 PM
Subject: Re: [amibroker] Re: Signals for next day's Trade
> Hello,
>
> There is no magic about this.
>
> Scan LISTS *RAW* buy/sell/short/cover signals.
>
> Backtest shows processed TRADES.
>
> No delays, no stops etc are applied.
> --------------------------------------------
> (unless you apply them explicitely by using Equity(1) somewhere in your formula
> - see below for more details)
>
> In other words SCAN is uses ZERO delay and no stops.
> (if you don't use Equity(1) in your formula)
>
> ===
> The basic idea is very simple: you create a system that generates
> buy/sell signals, and backtest it with buy/sell delay of 1 and trade on
> open. Backtester applies delays and signal generated using today's data
> causes tommorrows trade.
> You can run the same code with "SCAN" mode to generate
> signals FOR TOMMORROW because scan does not use delays
> so the signal for tommorrow will be shown today)
> ===
>
>
> Excerpt from the Guide: Automatic analysis window :
>
> "Scan
> this starts the signal scan mode - AmiBroker will search through defined range of stocks and quotations for buy/sell signals
defined
> by your trading rules.If one of the buy/sell conditions is fulfilled, AmiBroker will display a line describing when and on which
> stock the signal has occurred. Next AmiBroker proceeds to the end of the range so multiple signals on single stock may be
generated.
> "
>
> Note:
> If you use Equity(1) in your code you are simply RUNNING BACKTESTER INSIDE
> your code. The signals are then affected by all backtester settings,
> stops, etc.
>
> Therefore unless you know exactly what you are doing you should use Equity(0)
> that does not modify signals.
>
> The difference between Equity(0) and Equity(1) is very simple.
> Both work the same (perform internal backtest and calculate equity value)
> with one difference: Equity(1) WRITES BACK UPDATED buy/sell/short/cover
> signals so they represent ACTUAL TRADES taken.
>
> Equity(0) does NOT do this therefore does not affect scan results.
>
> Generally speaking people tend to abuse Equity(1) placing it everywhere
> without understanding what is going on.
>
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "Ken Close" <closeks@xxxxxxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Thursday, May 01, 2003 4:25 PM
> Subject: RE: [amibroker] Re: Signals for next day's Trade
>
>
> > Fred: thanks for the reply....I have tried what you suggest and I
> > *think* that the Scan shows the signals on the current day for the next
> > day in simple systems with simple rules. I see this by switching
> > between SCAN and BACKTEST. However, on more complex systems with
> > multiple rules it is not easy to determine what SCAN signal goes with
> > what BACKTEST Buy signal. I have read all of the documentation (but not
> > past message archives) and while SCAN is mentioned hundreds of times, it
> > is just the "word" and not a definition of how SCAN **WORKS**. Further
> > confusing the learning by trying is the action of Equity(1) command the
> > presence of which eliminates signals from SCAN. Sometimes these are
> > repeated signals (like three Shorts in a row) but other times it adds or
> > eliminates combinations of signals (when there are multiple exit or
> > entry rules). I still remain confused enough as to have low confidence
> > in acting on systems with multiple entry and exit rules....my problem I
> > am sure, but it is hard for me to grasp.
> >
> > Thanks again for the reply,
> >
> > Ken
> >
> > -----Original Message-----
> > From: Fred [mailto:fctonetti@xxxxxxxxx]
> > Sent: Thursday, May 01, 2003 10:09 AM
> > To: amibroker@xxxxxxxxxxxxxxx
> > Subject: [amibroker] Re: Signals for next day's Trade
> >
> > Ken,
> >
> > Not to intentionally not answer your question but can't you test with
> > a stock that you know has a buy on some particular open by setting
> > the day back one day and running the scan ?
> >
> > Fred
> >
> > PS I would think it would NOT show unless you change your criteria
> > from Buy Open / Delay 1 ... to ... Buy Close / Delay 0
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Ken Close" <closeks@xxxx> wrote:
> > > Hi: would someone review with me the seemingly simple task of
> > showing
> > > next days signals. What I mean is that a system that
> > > buys/sells/shorts/cover with 1 day delay at the open should be
> > showing a
> > > signal the night before in order to tell you to place an order the
> > next
> > > morning.
> > >
> > > How exactly do you get the signal to display?
> > >
> > > This is so basic a question that I am embarrassed to ask but ....
> > when
> > > one does a scan for the signals after nightly EOD download, does
> > SCAN
> > > show a signal for the next day's trade?
> > >
> > > I recall Dingo speaking of no signals showing in the Scan unless you
> > > create a separate file with different buy rules
> > >
> > > Buy = Ref(Buy,-1), etc.
> > >
> > > But this seem confusing at best and wrong at worst, but what is the
> > > answer?
> > >
> > > A patient and complete reply would be most helpful for me and I bet
> > a
> > > lot of others.
> > >
> > > Thanks,
> > >
> > > Ken
> >
> >
> >
> > Send BUG REPORTS to bugs@xxxxxxxxxxxxx
> > Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
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> >
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> >
> >
> >
> >
> >
> >
> > Send BUG REPORTS to bugs@xxxxxxxxxxxxx
> > Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
> > -----------------------------------------
> > Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
> > (Web page: http://groups.yahoo.com/group/amiquote/messages/)
> > --------------------------------------------
> > Check group FAQ at: http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> >
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> >
> >
> >
>
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