|
PureBytes Links
Trading Reference Links
|
Hello Roy,
Many thanks for your input on this issue. Your comments regarding good
coding practise and forward references are certainly valid but, in my
opinion, with certain caveats.
Any programming language is a tool to get the job done and the MS language,
even with its limitations, is one such tool. Therefore, I think that it is
necessary to take a closer look at what we want to achieve before deciding
upon a one-size-fits-all standard.
In the case of an Exploration, you are quite right; a forward reference is
not valid which is logically correct within the context of what we want to
achieve with an Exploration. The same probably applies to the System
Tester; we can achieve the desired results by exclusively using backward
references which, once again, reflects the real world.
However, (I think that) the situation is a little different when we are
dealing with charts which are primarily visual aids and conceptually
different in nature. If you want to identify a swing high/low bar on a
chart, then the forward reference is the tool for the job. After all,
aren't the Extend Right function on a trendline, or the use of displaced
moving averages, effectively forward references?
I guess the answer is that it all depends......
Regards
Kevin
At 11:35 25/11/2003 +1300, you wrote:
>
>Jay
>
>The following code taken from the Enter Long side of the "PS Fractal Trading
>System 1" system in MS 7.2 (and above) is a good example of how a peak
>preceded by two lower highs and followed by two lower highs can be coded and
>the vale of the peak captured without resorting to positive references. The
>second formula is variation on the same code that also detects two
>contiguous peak bars of the same value.
>
>The only difference between this and positive reference code performing the
>same task is the point of reference. I maintain that the point of reference
>should always be from the present looking backwards (to the past), not from
>some point in the past looking further into the past and also into the
>future.
>
>Roy
>
> {PS Fractal Trading System 1} {Enter Long}
>F1:=ValueWhen(1, H < Ref(H,-2) AND
>Ref(H,-1) < Ref(H,-2) AND
>Ref(H,-3) < Ref(H,-2) AND
>Ref(H,-4) < Ref(H,-2),Ref(H,-2));
>Cross(H,F1);
>
> {Fractal High}
>Single:=Ref(H,-2)>Ref(H,-4) AND
> Ref(H,-2)>Ref(H,-3) AND
> Ref(H,-2)>Ref(H,-1) AND
> Ref(H,-2)>H;
>Double:=Ref(H,-2)>Ref(H,-5) AND
> Ref(H,-2)>Ref(H,-4) AND
> Ref(H,-2)=Ref(H,-3) AND
> Ref(H,-2)>Ref(H,-1) AND
> Ref(H,-2)>H;
>F:=ValueWhen(1,Single OR Double ,Ref(H,-2));
>F;
>
>
>
> > In a message dated 11/24/2003 1:32:39 PM Pacific Standard Time,
> > rlarsen@xxxxxxxxxxxxxx writes:
> > Virtually all code written using positive references can be rewritten with
> > negative references alone and still provide the same information in the
>same
> > timely manner.
> > I use Clayburg's support and resistance in an Expert and find them
>valuable
> > for stop/entry points. I see no other way to create the symbols than to
>code a
> > forward reference for a Category 2 (or 1 or 3) support or resistance. If
>you
> > have a method to do this exclusively with negative references, please
>post.
> >
> > Category 2 support: A low range (not close) preceded by two ranges that
>were
> > higher ranges, and followed by two higher ranges.
> >
> > Category 2 resistance: The reverse of the above.
> >
> > This support and resistance will not display until two days (tics) after
>the
> > occurrence and makes an excellent entry/stop point. Several people on
>this
> > list have been asking for Clayburg formulas and to deny the forward
>reference is
> > to deny them that information.
> >
> > I still use the When statement (simply a variation of an If statement) in
> > some of my formulas and it is still supported by MetaStock. I see nothing
>wrong
> > with passing on all information regarding MetaStock code.
> >
> > Again, please post a formula that supports Category 2 formulas without a
> > forward reference.
> >
> > Jay
> >
>
>
>
>
>To unsubscribe from this group, send an email to:
>Metastockusers-unsubscribe@xxxxxxxxxxx
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
------------------------ Yahoo! Groups Sponsor ---------------------~-->
Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark
Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada.
http://www.c1tracking.com/l.asp?cid=5511
http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/zMEolB/TM
---------------------------------------------------------------------~->
To unsubscribe from this group, send an email to:
Metastockusers-unsubscribe@xxxxxxxxxxx
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
|