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This is so because your condition is never met.
BarSince will be null as long as condition is not met
for the very first time.
Only once condition is met at least once, the barssince
will be non-null.
Note that under QuickAFL and high zoom in levels,
not all bars in the database are actually seen by the formula,
hence your "Monday" condition may not be met if you
only display Wed-Fri on intraday chart.
Of course you can override by SetBarsRequired.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "sidhartha70" <sidhartha70@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Monday, November 24, 2008 1:02 AM
Subject: [amibroker] Re: BarsSince() question
> Specifically if I take the time interval down to 5min or less, I seem
> to get large periods of 'null' plots...
>
> Any ideas why...??
>
> Above 5min the plot is as I would expect it to be.
>
> --- In amibroker@xxxxxxxxxxxxxxx, "sidhartha70" <sidhartha70@xxx> wrote:
>>
>> To simplyify the question further, if I add the following line to a
>> basic price chart,
>>
>> Plot(BarsSince(DayOfWeek()==1),"x",colorPink,styleOwnScale);
>>
>> Can someone explain the plot output... because I'm somewhat confused.
>>
>> TJ?
>>
>> Thanks
>>
>> --- In amibroker@xxxxxxxxxxxxxxx, "sidhartha70" <sidhartha70@> wrote:
>> >
>> > Hi All,
>> >
>> > I'm trying to do some logic using the BarsSince() function... I want
>> > to spot when an element of an array is true within the last 10 bars...
>> >
>> > So I used something like,
>> >
>> > x = BarsSince(y)<10;
>> >
>> > Now if I plot the result,
>> >
>> > Plot(x,"x",colorGold,StyleOwnscale);
>> >
>> > I get some quite strange results... x appears to be null for large
>> > periods... I think it's something to do with how BarsSince() works.
>> >
>> > Anyone know what's going on here...?
>> >
>> > Many Thanks
>> >
>>
>
>
>
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