Barindex() is changed with chart zoom. How to fix it

[gopi]

when i plot barindex() it is changed with zooming the chart. How to make it unchanged?
It is changing with zoom out and zoom in.

[fxshrat]

forum search?

QuickAFL, was: Problem with BarCount

Hi there.. I have a problem with BarCount..for example when I use barcount in a program it count only some last bars showed in the chart window or some more.(when I zoom it in the BarCount count less data and when zoom it out it becomes more... and when I scroll the chart to the previous data, BarCount counts the last bar shown in the window as BarCount-1 Tnx for helping me...

How can i get the value of bar index for the first visible bar?

What you notice is result of QuickAFL To get actual bar(index) (if QuickAFL is applied) there is "quickaflfirstdatabar" field of Status function. bi = Barindex(); fvbi = FirstVisibleValue( bi ); qfdb = Status( "quickaflfirstdatabar" ); fdb = qfdb + fvbi;

So,

bi = Barindex();
qfdb = Status( "quickaflfirstdatabar" );

qbi = qfdb + bi;

[gopi]

Thanks for quick reply. I need volume of the first bar of the database.
i am using the code

fbarVolume = valuewhen(qfdb ==1,Volume) ;

it is not updated after some cadelbars.

[fxshrat]

Your first post does not mention any volume.
Have you read here before posting?
Why not taking time to create detailed to the point post in first place?

---

I need volume of the first bar of the database.

/// get Volume of very first data bar without deactivating QuickAFL
/// @link https://forum.amibroker.com/t/barindex-is-changed-with-chart-zoom-how-to-fix-it/12508/4
/// what is QuickAFL: http://www.amibroker.com/kb/2008/07/03/quickafl/
bi = Barindex();
qfdb = Status( "quickaflfirstdatabar" );
qbi = qfdb + bi;
quickAFL_first_vol = Ref(V, -qbi);
printf( "First DB bar's volume: %g", SelectedValue(quickAFL_first_vol) );

[gopi]

Thanks, It helps me lot