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Re: [amibroker] Please, Help Me !...

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Hi Graham,

I have been sweating on this matter for one week !!! I thought I was mistaken somewhere (I am not an AFL expert) but your reply set my mind at ease.
Thanks.

In a previous message, I already warned Tomasz but at first glance according to him, there would be no bugs in AB.
Wait and see.

Regards,
Evo1




Graham a écrit : 
Evo I have run a test myself and agree that the actual weekly and
timeframe inweekly are giving different results, not just more weeks
showing crossed but totally different values of the indicator for the
same period
I did a test and found that the value of Avg is not correct for your
use. replace it with calculated value and the dots line up, at least
as far as using expandlast allows
myavg = (H+L+C)/3;
Va2 = ((BBandTop(myAvg,20,2)-BBandBot(myAvg,20,2))/MA(myAvg,20))*100;

I suggest you advise AAB support of this discrepancy in calculation of Avg

--
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 1/6/06, Evo1 <Evo1@xxxxxxxxxxx> wrote:
  
Hi Steve,

1) I want to display on a daily chart the lowest level of the weekly
bandwidth (over 120 periods). On the  weekly chart, it corresponds to the
green candle (see screenshot below)
Its code is :

BwiH = ( (BBandTop( Avg, 20 ,2 )- BBandBot( Avg, 20 , 2 )) / MA( Avg, 20 )
)*100 ;
LLVBwiH = Ref( LLV( BwiH, 120) ,-1 ) ;
Lowestlevel = BwiH < LLVBwiH ;

2) In order to check the sync on the daily chart, I use the following code :

TimeFrameSet( inWeekly );
BwiH = ( (BBandTop( Avg, 20 ,2 )- BBandBot( Avg, 20 , 2 )) / MA( Avg, 20 )
)*100;
LLVBwiH = Ref(LLV(BwiH, 120),-1) ;
NivH = BwiH < LLVBwiH;

TimeFrameRestore();
NivH = TimeFrameExpand( NivH , inWeekly );

In the screenshot, you can clearly see that the result is false : the green
arrows (daily chart) are not in sync with the green candle (weekly chart).
You can check it by yourself : in my example, I used Tektronix, ticker TEK,
market SP 500.

Thanks for your valuable help
Regards,
Evo1



Steve Dugas a écrit :
Sorry Evo, guess I misunderstood...

Looks like your trouble may be use of Ref() function? I think it will shift
the array by one bar in both timeframes, removing a week's worth of data in
one case but only a day's worth in the other, causing loss of sync. You
could try using Ref( ...,-5 ), but then there are the 4-day weeks...   Or
you could try expanding the weekly bars before operating on them....    What
exactly are you looking to do?

Steve


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