Hello, BarCount is number of elements in AFL array. Its length is DYNAMIC (may change from execution to execution) depending on chart zoom level - if you zoom in the BarCount will decrease.
BarIndex() is represents FIXED quote (bar) index. It does not change when you zoom in/zoom out. It may only change when you add new quotations to the database or when you change the interval (for example daily to intraday). Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: "brian.z123" <[EMAIL PROTECTED]> To: <amibroker@yahoogroups.com> Sent: Saturday, March 03, 2007 10:49 AM Subject: [amibroker] Re: Mirroring the Chart > Robert, > > I plot everything that I can to help with understanding. > > Actually barcount doesn't plot so well; it only consistently works > when you first insert it (Tomasz will be tearing his hair out seeing > me recommend plotting it). It does, however, show clearly what it is > about in that one instance (a constant = = the total number of bars) > whereas barindex() is the zerobased progressive count = = periods. > > The lastvalue of barindex() = = lastvalue of barcount -1 > > BrianB2. > > --- In amibroker@yahoogroups.com, "rhoemke" <[EMAIL PROTECTED]> wrote: >> >> hi Brian, >> >> plotting is a good idea. >> >> Users Guide says: >> Barcount vs BarIndex() >> There is a fundamental difference between BarCount and BarIndex(). >> BarCount is a numeric variable that >> holds just one number (the count of elements in array). On the other >> hand BarIndex() is a function that returns >> ARRAY representing consecutive index of each bar. >> >> Seems i misunderstood. >> >> Let's see what the plot shows. >> >> Regards >> Robert >> >> --- In amibroker@yahoogroups.com, "brian.z123" <brian.z123@> wrote: >> > >> > Hello Robert, >> > >> > No. >> > >> > No problemo! >> > >> > If you plot barcount and barindex you will see it works a little >> > differently than you think. >> > >> > BrianB2. >> > >> > --- In amibroker@yahoogroups.com, "rhoemke" <robert@> wrote: >> > > >> > > It seems that there is at least a problem with Barcount and > BarIndex >> > (). >> > > As i understand, Barcount is just a number, showing the total > number >> > > of bars in the chart (starts counting at 0), and BarIndex() > shows >> > the >> > > actual number of the single bar. >> > > But this code shows different figures even for BarCount at > selected >> > > bar and i don't know why. >> > > Anybody who can help? >> > > >> > > SBI = SelectedValue(BarIndex()); >> > > "Selected BarIndex = "+WriteVal(SBI); >> > > "BarCount = "+WriteVal(BarCount); >> > > >> > > >> > > Regards >> > > Robert >> > > --- In amibroker@yahoogroups.com, "rhoemke" <robert@> wrote: >> > > > >> > > > Thank you Zoli, >> > > > >> > > > what i try to do is to mirror horizontaly at the avg of > selected >> > bar >> > > > AND vertically from selected bar. >> > > > This is why i think i need the loop. >> > > > >> > > > I try to mirror the past into the future, as it is described > in >> > Welles >> > > > Wilders Book about Adam Theory. >> > > > >> > > > Regards Robert >> > > > >> > > > >> > > > >> > > > --- In amibroker@yahoogroups.com, "zoli_j" <novizoli@> wrote: >> > > > > >> > > > > mySelectedBI = SelectedValue(BarIndex()); >> > > > > WriteVal(mySelectedBI); >> > > > > >> > > > > myMirrorHorizontalValue = ValueWhen(BarIndex() == > mySelectedBI, >> > Avg); >> > > > > Plot(myMirrorHorizontalValue, "myMHV", colorBlue, > styleLine); >> > > > > >> > > > > myDiffO = O - myMirrorHorizontalValue; >> > > > > myDiffH = H - myMirrorHorizontalValue; >> > > > > myDiffL = L - myMirrorHorizontalValue; >> > > > > myDiffC = C - myMirrorHorizontalValue; >> > > > > //PlotOHLC(myDiffO, myDiffH, myDiffL, myDiffC, "myDiff", >> > colorBlue, >> > > > > styleCandle); >> > > > > >> > > > > myO = IIf(NOT IsNull(myMirrorHorizontalValue), >> > > > > myMirrorHorizontalValue - myDiffO, O); >> > > > > myH = IIf(NOT IsNull(myMirrorHorizontalValue), >> > > > > myMirrorHorizontalValue - myDiffH, H); >> > > > > myL = IIf(NOT IsNull(myMirrorHorizontalValue), >> > > > > myMirrorHorizontalValue - myDiffL, L); >> > > > > myC = IIf(NOT IsNull(myMirrorHorizontalValue), >> > > > > myMirrorHorizontalValue - myDiffC, C); >> > > > > >> > > > > BR, Zoli. >> > > > > >> > > > > PlotOHLC(O, H, L, C, "PriceChart", colorBlack, styleCandle); >> > > > > PlotOHLC(myO, myH, myL, myC, "MirroRchart", colorBlue, >> > styleCandle); >> > > > > >> > > > > --- In amibroker@yahoogroups.com, "rhoemke" <robert@> wrote: >> > > > > > >> > > > > > Hello, >> > > > > > i am trying to mirror the chart from the selected bar. >> > > > > > >> > > > > > My code is this, but it doesn't plot a chart but only a >> > single bar. >> > > > > > Can someone see what is wrong. It is difficult for me to >> > describe in >> > > > > > english how the mirroring idea works, but maybe the code >> > shows it. >> > > > > > >> > > > > > Thank you. >> > > > > > >> > > > > > selectedBI = SelectedValue(BarIndex()); WriteVal > (SelectedBI); >> > > > > > mirroropen = 0; >> > > > > > mirrorhigh = 0; >> > > > > > mirrorlow = 0; >> > > > > > mirrorclose = 0; >> > > > > > WriteVal(BarCount-SelectedBI-1); >> > > > > > >> > > > > > for (i = 0;i<BarCount-1;i++); >> > > > > > { >> > > > > > if(i>=selectedBI) >> > > > > > { >> > > > > > mirroropen[i] = 2*Avg[SelectedBI] - O[2*SelectedBI-i]; >> > > > > > mirrorhigh[i] = 2*Avg[SelectedBI] - H[2*SelectedBI-i]; >> > > > > > mirrorlow[i] = 2*Avg[SelectedBI] - L[2*SelectedBI-i]; >> > > > > > mirrorclose[i] = 2*Avg[SelectedBI] - C[2*SelectedBI-i]; >> > > > > > } >> > > > > > else >> > > > > > { >> > > > > > mirroropen[i] = O[i]; >> > > > > > mirrorhigh[i] = H[i]; >> > > > > > mirrorlow[i] = L[i]; >> > > > > > mirrorclose[i] = C[i]; >> > > > > > } >> > > > > > } >> > > > > > >> > > > > > >> > > > > > >> > > > > > PlotOHLC(mirroropen, mirrorhigh, mirrorlow, mirrorclose, >> > > > > > "Mirrorchart", colorBlue); >> > > > > > >> > > > > >> > > > >> > > >> > >> > > > > > 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 NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroker.com/devlog/ > > For other support material please check also: > http://www.amibroker.com/support.html > > Yahoo! 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