[amibroker] Re: Visible range shown on chart

["BillBarack" <wbarack@xxxxxxxxxxx>]

Graham,

Thanks, it helps, but I keep getting error messages. Any ideas here? 
Am I mixing variable types or something like that?

Bill
PortValue = my expression;

Try #1:
barvisible = Status("barvisible");
//firstvisiblebar = barvisible AND NOT Ref( barvisible, -1 );
FVB = barvisible AND NOT Ref( barvisible, -1 );
LVB = barvisible AND NOT Ref(barvisible,1);
BarRange = LVB - FVB +1;
MinVal = LLV(PortValue,BarRange);
MaxVal = HHV(PortValue,BarRange);

Error Message for Try #1:

Line 182, Column 61:

Plot(PortValue,"",colorBlack,4|styleOwnScale,MinVal, MaxVal);
------------------------------------------------------------^

Bad args.
5-th argument of function call has invalid (or unsupported) type

Try #2:
barvisible = Status("barvisible");
//firstvisiblebar = barvisible AND NOT Ref( barvisible, -1 );
FVB = barvisible AND NOT Ref( barvisible, -1 );
LVB = barvisible AND NOT Ref(barvisible,1);
MinVal = LowestSince(FVB,PortValue);
MaxVal = HighestSince(FVB,PortValue);
Plot(PortValue,"",colorBlack,4|styleOwnScale,MinVal, MaxVal);

Error Message for Try #2:
Line 178, Column 61:
MinVal = LowestSince(FVB,PortValue);
MaxVal = HighestSince(FVB,PortValue);
Plot(PortValue,"",colorBlack,4|styleOwnScale,MinVal, MaxVal);
------------------------------------------------------------^

Bad args.
5-th argument of function call has invalid (or unsupported) type

--- In amibroker@xxxxxxxxxxxxxxx, "Graham" <gkavanagh@xxxx> wrote:
> Use 
> Status( "barvisible" );
> 
> Returns 1 if the bar is on screen
> 
> 
> 
> Cheers,
> Graham
> http://groups.msn.com/asxsharetrading
> http://groups.msn.com/fmsaustralia 
> 
> -----Original Message-----
> From: BillBarack [mailto:wbarack@x...] 
> Sent: Friday, 19 December 2003 6:21 AM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: [amibroker] Visible range shown on chart
> 
> 
> I've been struggling, trying to find a way to express in AFL, the 
> range currently shown on the chart. By this I mean, the Last bar 
> visible minus the first bar visible.
> 
> Can anyone point me in the right direction?
> 
> Thanks
> 
> Bill
> 
> 
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