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It is because the param in the AFL is limited to this number
Periods = Param("Periods", 15, 2, 200, 1, 10 );
Change the 200 to larger number
--
Cheers
Graham Kav
AFL Writing Service
http://www.aflwriting.com
2008/6/19 NW Trader <ta4charts@xxxxxxxxxxx>:
> Hi Ash,
>
> Works fine for me. Has for years (since '99).
>
> is there any reason that AB will not plot a moving average longer than 200?
> Yes -- not enough data.
>
> Do you have 500+ days (or whatever periods you are using) available? Do you
> understand how a moving average is computed? After buying a program like
> AB, is there any reason that one would not understand how to use it? AB is
> great, but it cant invent historical data to write a MA longer than the
> available data.
>
> Hint: Make certain that you have at least 1000 periods in your database.
> If you are using the canned formula (and set number of bars to load to
> 1000) if you want to see it from at least the last 500 bars, or use
> SetBarsRequired at the top of your personal formula. Why more than 500? --
> learn the formula and you'll understand.
>
> Peace and Justice --- Patrick
>
> ----- Original Message -----
> From: Ashley Webb
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Wednesday, June 18, 2008 4:03 PM
> Subject: [amibroker] why wont AB plot a 500sma?
> After all these years of development is there any reason that AB will
> not plot a moving average longer than 200?
> Thanks
> Ash
>
>
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