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Hello
I have posted a PDF file "PROFIT LOCKING AND THE RELATIVE PRICE CHANNEL2" for documentation purposes in the FILES section, which reworks the trailing stop to start calculations from the input date with screen shots (AB & MS) for anyone interested in Leon Wilson's article PROFIT LOCKING AND THE RELATIVE PRICE CHANNEL S&C Traders' Tips Issue 1/2008. (and fixes the trailing stop issue)
The amibroker code works same way as Leon's original Metastock code published in S&C Traders Tips 1/2008.
For reference the articles can be found at:
http://www.traders.com/documentation/FEEDbk_docs/2008/01/TradersTips/TradersTips.html#amibroker
OR
http://www.amibroker.com/members/traders/01-2008.html
Regards
Ed
--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx> wrote:
>
> IIF works on *both* arrays and scalars, if both arguments are scalar it will return scalar.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "edwol53" <edwol@xxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Tuesday, July 28, 2009 8:42 AM
> Subject: [amibroker] Re: Trailing stop does not work -
>
>
> > Keith
> >
> > Thanks for your input BUT this is TJ's code, I would expect that it would be correct, I recall reading somewhere that assigning a
> > scalar in this fashion works as a Logical AND for scalars againts the entire array.
> >
> > I had to stare at this for a while myself.
> >
> > Any other sugesstions?
> >
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, Keith McCombs <kmccombs@> wrote:
> >>
> >> In the code below, TL[i] is a 'value'. IIf() operates on arrays and
> >> returns an 'array'. Therefore, you are trying to set a 'value' equal to
> >> an array, which is impossible.
> >>
> >> TL[ i ] = IIf( Cond1 AND Stop[ i ] > Value3, Stop[ i ],
> >> IIf( Cond1 AND Stop[ i ] < Value3, Value3,
> >> IIf( NOT Cond1, Prev, Stop[ i ] * HoldingDays[ i ] ) ) );
> >>
> >> Re-read User Manual and/or Help regarding arrays. Re-read it again, and
> >> again.
> >> This is a classic mistake made by many AFL newbees.
> >>
> >>
> >> edwol53 wrote:
> >> >
> >> >
> >> > Hello
> >> >
> >> > Could any AFL expert or any one else see why the traing stop (for long
> >> > side) in the code below does not work?
> >> >
> >> > I have uploaded a PDF ("PROFIT LOCKING AND THE RELATIVE PRICE
> >> > CHANNEL-2.pdf "
> >> > http://f1.grp.yahoofs.com/v1/0IVuSoMsbmfIJkS8BkrK-OzCjyoqwQfjxR02zpQSIVvPq-fWYu_5Bakzj2IZQxSdhHaawLCqyDLqtawdnYI3uJezUqn-/PROFIT%20LOCKING%20AND%20THE%20RELATIVE%20PRICE%20CHANNEL%202.pdf
> >> > <http://f1.grp.yahoofs.com/v1/0IVuSoMsbmfIJkS8BkrK-OzCjyoqwQfjxR02zpQSIVvPq-fWYu_5Bakzj2IZQxSdhHaawLCqyDLqtawdnYI3uJezUqn-/PROFIT%20LOCKING%20AND%20THE%20RELATIVE%20PRICE%20CHANNEL%202.pdf>)
> >> >
> >> > of screen shots of Amibroker and the working version of Metastock for
> >> > the same indicator in the files section for temporary reference.
> >> >
> >> > There seems to be an intial value that I cannot see where it
> >> > originates from. There are some commented out attempts to see where
> >> > the problem left in the code below that can be deleted - they give the
> >> > same result.
> >> >
> >> > Thanks in advance for some input
> >> > Ed
> >> >
> >> > Code:
> >> > //PROFIT LOCKING AND THE RELATIVE PRICE CHANNEL
> >> > //Amended - 27 July 2009
> >> > //S&C Traders' Tips Issue 1/2008
> >> > Version(5.20); //Requires v5.20
> >> > SetBarsRequired(sbrAll); //Use all available bars
> >> > dt = ParamDate("Date of the trend", "2008-11-21" ); // get start date
> >> > Value1 = Param("Bearish Periods", 21, 3, 55 );
> >> > Value2 = Param("Multiplication Factor", 3.8, 1, 10 );
> >> > Value3 = Param("Initial Stop", 10, 0, 1e6 );
> >> > Value4 = Param("Channel Periods", 21, 3, 55 ); // Channel Periods
> >> > Value5 = Param("Overbought region", 75, 1, 100 ); // Overbought region
> >> > Value6 = Param("Channel Smoothing", 1, 1, 10 );
> >> >
> >> > Start = Cross(DateNum(),dt);
> >> > Started = Flip(Start, 0);
> >> >
> >> > HoldingDays = BarsSince( DateNum() < dt );
> >> >
> >> > Index = RSI( Value4 );
> >> > OB = EMA( Index - Value5, Value6 );
> >> > Bullish = Close - ( Close * OB/100 );
> >> >
> >> > //Calculate trailing stop line
> >> > TL = Null;
> >> > Stop = Null;
> >> > Prev = 0; //Temporary scalar variable
> >> > trailstop = 0;
> >> >
> >> > Bearish = Sum( abs( Low - Ref( Low, -1 ) ), Value1 ) / Value1;
> >> > RangeA = Sum( Close - Low, Value1 ) / Value1;
> >> > Stop = Close - ( ( Bearish + RangeA ) * Value2 );
> >> >
> >> > for( i = 1; i < BarCount; i++ )
> >> > {
> >> > if(Started[i] == 0 ) continue;
> >> > Prev = TL[ i - 1 ];
> >> > Cond1 = Stop[ i ] > Prev;
> >> >
> >> > // if(NOT(Started[i-1]) AND Started[i]) TL[i-1] = Value3; //OR use
> >> > TL[i-1] = Stop[i-1];
> >> >
> >> > /* if( Stop[ i ] > Prev AND Stop[ i ] > Value3)
> >> > trailstop = Stop[ i ];
> >> > else
> >> > if( Stop[ i ] > Prev AND Stop[ i ] < Value3)
> >> > trailstop = Value3;
> >> > else
> >> > if( Stop[ i ] <= Prev)
> >> > trailstop = Prev;
> >> > else trailstop = Stop[ i ] * HoldingDays[ i ] ;
> >> > TL[ i ] = trailstop;
> >> > */
> >> > /*
> >> > TL[ i ] = IIf( Stop[ i ] > Prev AND Stop[ i ] > Value3, Stop[ i ],
> >> > IIf( Stop[ i ] > Prev AND Stop[ i ] < Value3, Value3,
> >> > IIf( Stop[ i ] <= Prev, Prev, Stop[ i ] * HoldingDays[ i ] ) ) );
> >> > */
> >> >
> >> > TL[ i ] = IIf( Cond1 AND Stop[ i ] > Value3, Stop[ i ],
> >> > IIf( Cond1 AND Stop[ i ] < Value3, Value3,
> >> > IIf( NOT Cond1, Prev, Stop[ i ] * HoldingDays[ i ] ) ) );
> >> >
> >> > }
> >> > /* _TRACE(" i = " + NumToStr(i, 1.0) + " index date = " + NumToStr(dt,
> >> > 1.0) + " Stop i = " + NumToStr(Stop, 3.0) + " TL[i] = " + NumToStr(TL,
> >> > 3.0)); */
> >> >
> >> > // TL = IIf( HoldingDays == 0, Null, TL ); // Plot from the input date
> >> > Bullish = IIf( HoldingDays == 0, Null, Bullish );
> >> >
> >> > Plot( C, "Price", IIf( C > O, colorGreen, colorRed ), styleCandle );
> >> > Plot( TL, "TL", colorBlue );
> >> > Plot( Stop, "Stop", colorGreen );
> >> > // Plot( Prev, "Prev", colorRed );
> >> > // Plot( Bullish, "Bullish", colorLightGrey );
> >> > // PlotOHLC( TL, TL, Bullish, Bullish, "", ColorRGB( 230, 230, 230),
> >> > styleCloud | styleNoLabel );
> >> > Title = "{{NAME}} - {{DATE}} - {{VALUES}}";
> >> >
> >> >
> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > **** IMPORTANT PLEASE READ ****
> > This group is for the discussion between users only.
> > This is *NOT* technical support channel.
> >
> > TO GET TECHNICAL SUPPORT send an e-mail directly to
> > SUPPORT {at} amibroker.com
> >
> > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
> > http://www.amibroker.com/feedback/
> > (submissions sent via other channels won't be considered)
> >
> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> > http://www.amibroker.com/devlog/
> >
> > Yahoo! Groups Links
> >
> >
> >
>
------------------------------------
**** IMPORTANT PLEASE READ ****
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This is *NOT* technical support channel.
TO GET TECHNICAL SUPPORT send an e-mail directly to
SUPPORT {at} amibroker.com
TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
http://www.amibroker.com/feedback/
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