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you will find that some line plots will not exist if the particular
day is not traded.
21 days is 3 weeks, so perhaps you want to select every third Wednesdays
however if a wednesday is not traded then the following wdnesday will
be used, so maybe this no good, but something to begin with
plot( (cum( dayofweek()==3 ))%3==0, "", colorred,
stylehistogram|styleownscale, 0.1, 1 );
AB is really set up for trading days, not calender days.
you could do it, but it gets a bit more complex and you would be using
dayofyear() and then needing to organise the counting around the end
to beginning of next year. You will then even if you got the counting
right you will still have the problem of no line drawn if that day21
is not trading day.
On 9/5/05, Terry <MagicTH@xxxxxxxxxxx> wrote:
> Right, holidays are a problem since they don't show up in AB.
> Maybe you could track every third Wednesday (or whatever dayofweek your
> date is) by using DAYOFWEEK.
>
> I do have some code that tracks holidays and find options expiration
> day. You have to maintain the holiday list, but that's fairly easy to do
> once a year.
> --
> Terry
>
> | -----Original Message-----
> | From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On
> | Behalf Of bilbod
> | Sent: Sunday, September 04, 2005 12:49
> | To: amibroker@xxxxxxxxxxxxxxx
> | Subject: Re: [amibroker] Date
> |
> | Terry wrote:
> |
> | > Since you're guaranteed to have exactly 6 weekend days every 21
> | calendar
> | > days just change the %21 to %15 (21 - 6)
> | > --
> |
> | What about holidays?
> |
> | It would be nice if AB let you have the option of using colander days
> | or
> | trading days.
> |
> | Bill
> |
> |
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--
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
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