Hi DM, The code I posted works just fine. Sorry if I caused the confusion by typing in 1-3-06 as a date in my column title. There are indeed 57 bars since 12-30-05.
It retrieves the closing price on 12/30/05. And from that I can calculate the YTD % performance. Here is the price % calculations and some extra code to verify (visually) that it works. // Price Deltas AddColumn( ( (C-Ref(C,-1))/Ref(C,-1))*100,"1 P %", 3.2, colorYellow,colorGreen); AddColumn( ( (C-Ref(C,-5))/Ref(C,-5))*100,"5 P %", 3.2, colorYellow,colorGreen); AddColumn( ( (C-Ref(C,-21))/Ref(C,-21))*100,"21 P %", 3.2, colorYellow,colorGreen); AddColumn( ( (C-Ref(C,-63))/Ref(C,-63))*100,"63 P %", 3.2, colorYellow,colorGreen); AddColumn( ( (C-Ref(C,-255))/Ref(C,-255))*100,"255 P %", 3.2, colorYellow,colorGreen); BS = BarsSince(Year()!=Ref(Year(),1)); AddColumn(BS,"BS 12-30-06" , 3.2, colorDarkRed, colorLightGrey ); LC = Ref( C,-BS); AddColumn(LC,"LC" , 3.2, colorDarkRed, colorLightGrey ); YTDP = ( (C - Ref( C,-BS)) / Ref( C, -BS) )*100; AddColumn(YTDP,"YTD %" , 3.2, colorDarkRed, colorLightGrey ); LYC = ValueWhen( Year()!=Ref(Year(),1), C ); AddColumn(LYC,"L YR C" , 3.2, colorDarkRed, colorLightGrey ); PCLY = ( (C - LYC)/ LYC )*100; AddColumn(PCLY,"% from LY", 3.2, colorDarkRed, colorLightGrey ); MM --- In [email protected], "dmcleod1981" <[EMAIL PROTECTED]> wrote: > > Sorry meant to type 01/01/06 for second lines closing price not '04. > > DM > --- In [email protected], "dmcleod1981" <dmcleod1981@> wrote: > > > > The two formulas appear to give different dates. The first does give > > the closing price for 12/30/04 but the second gives the closing price > > for 01/03/04 which would be incorrect for year to date figures. > > > > I am also confused as to the +1 and couldn't see how to correct the > > line to give the closing '05 price. > > > > DM > > > > --- In [email protected], "MarketMonk777" <dlittner@> wrote: > > > > > > Hi Graham, > > > > > > Thanks, the barssince works. I have added the following lines of > code: > > > > > > BS = BarsSince(Year()!=Ref(Year(),1)); > > > AddColumn(BS,"BS 1-1-06" , 3.2, colorDarkRed, colorLightGrey ); > > > YTD = C - Ref( C, -BarsSince(Year()!=Ref(Year(),1))+1); > > > AddColumn(YTD,"YTD Net" , 3.2, colorDarkRed, colorLightGrey ); > > > > > > Just to confirm that all works. > > > > > > I am confused as to the purpose of the +1 that is added at the end > > of the > > > code in the YTD line. > > > > > > I was able to research and figure out that != means not equal to. And > > > researched how barssince works. And that ref(year(),1) is the way > > to catch > > > the year changing from 2005 to 2006. > > > > > > But that +1 has me confused. What is it's purpose? > > > > > > Dave > > > > > > -----Original Message----- > > > From: [email protected] [mailto:[EMAIL PROTECTED] > > On Behalf > > > Of Graham > > > Sent: Saturday, March 25, 2006 3:47 PM > > > To: [email protected] > > > Subject: Re: [amibroker] Calculating % change since 1/3/2006 > > > > > > you can use valuewhen function to reference a fixed point or ref with > > > barssince > > > for the close price of end of previous year > > > > > > valuewhen( year()!=ref(year(),1), C ) > > > > > > or > > > > > > ref( c, -barssince(year()!=ref(year(),1))+1) > > > > > > > > > -- > > > Cheers > > > Graham > > > AB-Write >< Professional AFL Writing Service > > > Yes, I write AFL code to your requirements > > > http://e-wire.net.au/~eb_kavan/ab_write.htm > > > > > > > > > On 3/26/06, marketmonk777 <dlittner@> wrote: > > > > Hi folks, > > > > > > > > I would like to add a value to my title line and in some of my > > > > explorations. The value that I am trying to determine is the % > change > > > > since the last trading day of 2005 (or should I use 1/3/06?). > > > > > > > > How do I specify a fixed date in my calculations? > > > > > > > > Thanks, > > > > > > > > Dave > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Please note that this group is for discussion between users only. > > > > > > > > To get support from AmiBroker please send an e-mail directly to > > > > SUPPORT {at} amibroker.com > > > > > > > > For other support material please check also: > > > > http://www.amibroker.com/support.html > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Please note that this group is for discussion between users only. > > > > > > To get support from AmiBroker please send an e-mail directly to > > > SUPPORT {at} amibroker.com > > > > > > For other support material please check also: > > > http://www.amibroker.com/support.html > > > > > > > > > Yahoo! Groups Links > > > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> Try Online Currency Trading with GFT. Free 50K Demo. Trade 24 Hours. Commission-Free. http://us.click.yahoo.com/RvFikB/9M2KAA/U1CZAA/GHeqlB/TM --------------------------------------------------------------------~-> Please note that this group is for discussion between users only. To get support from AmiBroker please send an e-mail directly to SUPPORT {at} amibroker.com For other support material please check also: http://www.amibroker.com/support.html Yahoo! 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