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<FONT face=Arial color=#0000ff
size=2>William,
Yes, I
figured that out when I did some quick calculations on a piece of paper. Dennis
also pointed out that both X and Y could be handled inside a single loop. I have
learned several things the last few days!! Thanks for your
help
Regards,
Jayson
<FONT face=Tahoma
size=2>-----Original Message-----From: William Peters
[mailto:williampeters@xxxxxxxxxxxx]Sent: Thursday, November 27, 2003
4:41 PMTo: amibroker@xxxxxxxxxxxxxxxSubject: RE:
[amibroker] sum only positive daysJayson,You
need to change that loop a little. The loop should continue while i < pds +
1See below. Otherwise your home.for( i = 1; i < pds + 1; i++
){ x = x + ValueWhen( C > Ref( C, -1 ),
Volume, i );}y = 0;for( i = 1; i < pds + 1; i++
){ y = y + ValueWhen( C < Ref( C, -1 ),
Volume, i );}Regards,William
Peterswww.amitools.com-----Original Message-----From:
Jayson [mailto:jcasavant@xxxxxxxxxxx]Sent: Thursday November 27, 2003 11:54
AMTo: amibroker@xxxxxxxxxxxxxxxSubject: RE: [amibroker] sum only
positive daysThanks to all who provided interesting and creative
approaches to myquestion. My goal was to look at the last 20 up days and
compare the volumeto the last 20 down days. William Peters got me started
with a for loop (Ireally have to learn better to use these!!) and others
provided variations.and I came up with the
following......pds=Param("PDS",20,6,22,1);smooth=Param("Smooth",12,1,50,1);trig=Param("Trigger",10,1,25,1);x
= 0;for( i = 1; i < pds; i++ ){
x = x + ValueWhen( C > Ref( C, -1 ), Volume, i );}y = 0;for( i =
1; i < pds; i++ ){ y = y + ValueWhen( C
< Ref( C, -1 ), Volume, i
);}vp=EMA(x-y,smooth);trigger=MA(vp,trig);Plot(vp,"",IIf(x-y>0,colorBrightGreen,colorRed),1);Plot(trigger,"",colorYellow,1);Title="A/D
Volume of "+Name()+ " is "+WriteIf(x-y>0,EncodeColor(colorBrightGreen)+
"Positive",EncodeColor(colorRed)+" Is
Negative")+EncodeColor(colorWhite)+"\nBar % of all Vol Average =
"+WriteVal(V/MA(V,50)*100,1.0)
+"%";Buy=Cross(Vp,trigger);Sell=Cross(trigger,Vp);Equity(1);I am
still experimenting with look back parameters and perhaps somesmoothing. The
MA cross may be important or perhaps a zero cross is more tothe point. It
will take some study. In any case this looks like aninteresting way to gauge
money flow into and out of a stock. If there ismore interest (volume) on up
days then perhaps the stock is underaccumulation, if more on down days
perhaps distribution. At first glance theindicator turns ahead of the price.
I like that as it allows me a heads up.Please do not confuse my reference to
"Buy" and "Sell" as a system. This isjust an interesting study that some of
you may find useful.Enjoy your
HolidayRegards,Jayson-----Original Message-----From:
Graham [mailto:gkavanagh@xxxxxxxxxxxxx]Sent: Wednesday, November 26, 2003
5:49 PMTo: amibroker@xxxxxxxxxxxxxxxSubject: RE: [amibroker] sum only
positive daysJayson, this will sum the last 20 bars for x
which will either be zero orthe
volume.x=iif(c>ref(c,-1),v,0)Y =
sum(x,20);Cheers,Graham<A
href="">http://groups.msn.com/ASXShareTrading<A
href="">http://groups.msn.com/FMSAustralia>
-----Original Message-----> From:
Jayson [mailto:jcasavant@xxxxxxxxxxx]>
Sent: Thursday, 27 November 2003 3:18 AM>
To: 1ami>
Subject: [amibroker] sum only positive
days>> I cannot seem to get my mind around what should be a fairly
simple thing> to code. Perhaps someone could nudge me in the right
direction.>> I want to sum the volume of the last 20 up days and
compare it to the last> 20 down days. This is not to be confused with
summing the up days of the> last 20 bars, Simple code such as
plot( c>ref(c,-1)"",4,2); will plot> just the up days and
x=iif(c>ref(c,-1),v,0) can calculate the volume but> how do I sum the
last 20 bars where x>0 as opposed to summing the last 20> bars of
X ?>> TIA>> Regards,>
Jayson>Yahoo! Groups
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