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Hi Jose
I just joined the tradersconsortium.com group, but how can we become
premium members?
many thanks for your help.
Rdgs
Barry
--- In equismetastock@xxxxxxxxxxxxxxx, "Jose Silva" <josesilva22@xxx>
wrote:
>
> Xtend.dll is a very simple and useful tool - it is a MetaStock
external
> function that extends a plot's first/last value to each edge of the
chart.
>
> Xtend.dll is now available for download free to premium members of
the
> Trader's Consortium forum.
> http://tradersconsortium.com
>
> As for any Trader's Consortium premium members that have previously
> purchased this tool from MetaStockTools.com, please contact me for
a full
> refund of your US$60.
>
>
> From http://www.metastocktools.com/#metastock :
>
> =======================================================
> Null (N/A) bar removal, with and without PREV functions.
> =======================================================
>
>
> Problem:
> -------
>
> Indicators and conditions generally introduce leading and
> (sometimes) trailing Null (N/A) bars on a plot.
>
> These Null bars can stop any other generated signals being
> plotted during that Null period.
>
> For example, a 21-bar SMA will not allow any signals based
> on it to be plotted on any of the first 20 bars.
> No other related code can possibly plot within this Null zone.
>
>
>
> Example:
> -------
> (note 32/31 bar leading/trailing null zone)
>
> ---8<---------------------------------------
> { Three month centered Simple Moving Average }
> pds:=Input("SMA periods",1,2520,63);
> Ref(Mov(C,pds,S),LastValue(pds/2))
> ---8<---------------------------------------
>
>
>
> Solution 1:
> ----------
> (compare plot to above)
>
> =======================
> Null bar removal - PREV
> =======================
> ---8<---------------------------------------
>
> { Removes leading/trailing Null (N/A) bars.
> Centered SMA example uses hindsight
> - do not trade.
>
> To avoid the PREVx2 processing overhead, try
> the Xtend.dll custom DLL, available for US$60
> through MetaStockTools.com.
> Also available for free at
> Trader's Consortium forum:
> http://tradersconsortium.com
>
> ©Copyright 2003-2007 Jose Silva.
> For personal use only:
> no resale or repackaging allowed.
> All code remains the property of Jose Silva.
> http://www.metastocktools.com }
>
> { User input }
> pds:=Input("SMA periods",1,2520,63);
>
> { Centered SMA }
> indic:=Ref(Mov(C,pds,S),LastValue(pds/2));
>
> { 1st valid plot bar }
> defined:=IsDefined(indic);
> bar1:=Cum(defined)=1;
>
> { Remove leading/trailing Null bars }
> NoNull:=If(Cum(defined)>0,
> LastValue(indic+PREV-PREV),
> LastValue(ValueWhen(1,bar1,indic)));
>
> { Plot on chart }
> NoNull
>
> ---8<---------------------------------------
>
> The solution above introduces PREV function related problems,
> mainly a major slowdown of processing speed (not suitable for
> real-time data), and unreliability issues.
>
>
>
> Solution 2:
> ----------
> Same null-less plot as above, with the much simpler
> and more reliable Xtend.dll, and without the PREVx2
> processing overhead.
>
> ======================
> Null bar removal - DLL
> ======================
> ---8<---------------------------------------
>
> { Removes leading/trailing Null (N/A) bars.
> Centered SMA example uses hindsight
> - do not trade.
>
> Xtend.dll must be in
> ...\MetaStock\External Function DLLs\ folder.
> Xtend.dll custom DLL, available for US$60
> through MetaStockTools.com.
> Also available for free at
> Trader's Consortium forum:
> http://tradersconsortium.com
>
> ©Copyright 2003-2007 Jose Silva.
> For personal use only:
> no resale or repackaging allowed.
> All code remains the property of Jose Silva.
> http://www.metastocktools.com }
>
> { User input }
> pds:=Input("SMA periods",1,2520,63);
>
> { Centered SMA }
> indic:=Ref(Mov(C,pds,S),LastValue(pds/2));
>
> { Plot on chart }
> ExtFml("Xtend.Xtend",indic)
>
> ---8<---------------------------------------
>
>
>
> Xtend.dll sample application 1:
> ------------------------------
>
> ==================
> MA - centered (DLL)
> ==================
> ---8<---------------------------------------
>
> { Centered Moving Average v6.1
> Uses forward-referencing to
> center Mov Avg and project future direction.
> Uses hindsight - do not trade!
>
> Xtend.dll must be in
> ...\MetaStock\External Function DLLs\ folder.
> Xtend.dll custom DLL, available for US$60
> through MetaStockTools.com.
> Also available for free at
> Trader's Consortium forum:
> http://tradersconsortium.com
>
> Copyright © 2003~2007 Jose Silva.
> The grant of this license is for personal use
> only - no resale or repackaging allowed.
> All code remains the property of Jose Silva.
> http://www.metastocktools.com }
>
> { User inputs }
> pds:=Input("Mov Avg periods",1,2600,21);
> fwPds:=Input("Forward-referencing periods [automatic: -1]",-
1,2600,-1);
> proj:=Input("Project last known MA: [1]Direction, [2]
Value",1,2,1);
> projCl:=Input("Project back last Close? [1]Yes, [0]No",0,1,0);
> channel:=Input("Channel +/- boundary %",
> 0,1000,4)/100;
> type:=Input("[1]EMA [2]SMA [3]TmSr [4]Tri [5]Var [6]Vol [7]
Wght",1,7,2);
>
> { Choose MovAvg type:
> 1 - Exponential MA
> 2 - Simple MA
> 3 - Time Series MA
> 4 - Triangular MA
> 5 - Variable MA
> 6 - Volume adjusted MA
> 7 - Weighted MA }
> ma:=
> If(type=1,Mov(C,pds,E),
> If(type=2,Mov(C,pds,S),
> If(type=3,Mov(C,pds,T),
> If(type=4,Mov(C,pds,TRI),
> If(type=5,Mov(C,pds,VAR),
> If(type=6,Mov(C,pds,VOL),
> Mov(C,pds,W)))))));
>
> { Automatic period-centering }
> center:=LastValue(If(fwPds<0,Int(pds/2),fwPds));
>
> { Forward-referenced MovAvg }
> fwd:=Ref(ma,center);
>
> { Last valid MovAvg plot point }
> valid:=Cum(IsDefined(fwd))
> =LastValue(Cum(IsDefined(fwd)));
> valid:=valid AND Alert(valid=0,2);
>
> { Extend MovAvg plot into Null zones }
> movAvg:=ExtFml("Xtend.Xtend",fwd);
>
> { Last MA known direction & future projection }
> init:=Cum(IsDefined(fwd))=1;
> direction:=movAvg+
> If(IsUndefined(fwd),
> ValueWhen(1,init OR valid,movAvg)-
> ValueWhen(1,init OR valid,Ref(movAvg,-1)),0)
> *BarsSince(init OR valid);
>
> { Choose Centered MovAvg type }
> CMA:=If(proj=1,direction,movAvg);
>
> { Projection channels }
> restrict:=If(BarsSince(valid),CMA,CMA);
> UpChannel:=restrict*(1+channel);
> DwChannel:=restrict*(1-channel);
>
> { Last Close back-projection }
> x:=LastValue(C);
> x:=If(projCl,If(BarsSince(valid),x,x),CMA);
>
> { Plot on price chart }
> UpChannel;DwChannel;x;CMA
>
> ---8<---------------------------------------
>
>
>
> Xtend.dll sample application 2
> ------------------------------
>
> Problem:
> -------
> ---8<---------------------------------------
> entry:=Cross(C,Mov(C,5,S));
> exit:=Cross(Mov(C,21,S),C);
> entry-exit
> ---8<---------------------------------------
>
> Note how the undefined exit signals in the formula above
> prevent any entry signals from plotting in the first 20 bars.
>
> Why would we want to mix entry & exit signals into a single plot?
> Compare below to plot above:
>
> ---8<---------------------------------------
>
> { Entry/Exit signals }
> entry:=Cross(C,Mov(C,5,S));
> exit:=Cross(Mov(C,21,S),C);
>
> { Remove redundant signals }
> init:=Cum(IsDefined(entry+exit))=1;
> bin:=ValueWhen(1,entry-exit<>0 OR init,entry);
> long:=bin*(Alert(bin=0,2) OR entry*Cum(entry)=1);
> short:=(bin=0)*(Alert(bin,2) OR exit*Cum(exit)=1);
>
> { Plot in own window }
> long-short
>
> ---8<---------------------------------------
>
>
>
> Now compare to the almost identical version below, where the
> Null zone is removed from the initial 20 bars of the chart:
>
> =================
> Null zone removed
> =================
> ---8<---------------------------------------
>
> { Allows the plotting of entry/exit signals
> during undefined signal periods.
> Sample only - do not trade!
>
> Xtend.dll must be in
> ...\MetaStock\External Function DLLs\ folder.
> Xtend.dll custom DLL, available for US$60
> through MetaStockTools.com.
> Also available for free at
> Trader's Consortium forum:
> http://tradersconsortium.com
>
> Copyright © 2003~2007 Jose Silva.
> The grant of this license is for personal use
> only - no resale or repackaging allowed.
> All code remains the property of Jose Silva.
> http://www.metastocktools.com }
>
> { Entry/Exit signals }
> entry:=Cross(C,Mov(C,5,S));
> exit:=Cross(Mov(C,21,S),C);
>
> { Remove Null plot bars }
> entry:=IsDefined(entry)*ExtFml("Xtend.Xtend",entry);
> exit:=IsDefined(exit)*ExtFml("Xtend.Xtend",exit);
>
> { Remove redundant signals }
> init:=Cum(IsDefined(entry+exit))=1;
> bin:=ValueWhen(1,entry-exit<>0 OR init,entry);
> long:=bin*(Alert(bin=0,2) OR entry*Cum(entry)=1);
> short:=(bin=0)*(Alert(bin,2) OR exit*Cum(exit)=1);
>
> { Plot in own window }
> long-short
>
> ---8<---------------------------------------
>
>
>
> The Xtend.dll custom DLL is a simple time-saving tool, useful for
> whenever a plot needs to be extended from the last known defined
value
> through and into the Null (N/A) bar zone.
>
> The Xtend function will extend the first definable value backwards
to
> the first bar, and the last definable value forward to the last bar.
> It does this with minimal processing overheads.
>
> Xtend.dll is a small and efficient MetaStock DLL, and is
> compatible with all versions of MetaStock v7.0 and later.
>
> The Xtend.dll custom DLL is available for US$60 through
MetaStockTools.com.
> Also available for free at the download section of Trader's
Consortium
> forum:
> http://tradersconsortium.com
>
>
> Once downloaded, Xtend.dll can be installed easily:
>
> Close MetaStock (v8.0 or later), extract the contents of
> Xtend.zip and run Xtend.exe, which will place Xtend.dll in the
> ...\MetaStock\External Function DLLs\ folder, and also import
> "Null bar removal - DLL" & "MA - centered (DLL)" sample indicators.
>
> For MetaStock versions earlier than 8.0, please copy Xtend.dll
> manually to the ...\MetaStock\External Function DLLs\ folder,
> and re-start MetaStock.
>
>
>
> jose '-)
> http://www.metastocktools.com
>
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