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[amibroker] Re: System development tutorial by Herman van den Bergen



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Paul,

Someone else needs to explain. I just noticed in using it that you can indeed load whatever you wish into any formula by using CTRL E on any chart. That chart will have a name and it may be a built-in name. The loaded AFL will stay there until you change it. If you SAVE FORMULA it saves it under the current name unless you choose New and put it there. 

I know there’s a way to recover a built-in formula if you did this. It may not even really save anything. As to where it’s stored or what really happens, someone more knowledgeable please jump in.

TH
--

Terry:

Since LOAD FORMULA prompts me to select an AFL file, I infer that you are saying that the Built-In indicators are not hardwired into AB, but rather are a set of standalone AFL files living somewhere in the AmiBroker folder tree.  Yes?

If so, I do indeed see some AFL files under C:\Program Files\Amibroker\AFL, but I don't see any file with a name resembling "Equity Line".  Do you happen to know what the name is for that particular "Built-In" AFL file?

Thank you.

   -Paul

At 05:18 AM 5/15/2004, you wrote:
   Date: Fri, 14 May 2004 14:47:22 -0600
   From: Terry <TH@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: Saving formulas in IB

It&#8217;s not actually saved. AB saves whatever is there when you close as a sort
of temporary file (it&#8217;s save in the chart so to speak), but you can do a
LOAD FORMULA to get the original back.

TH
--

> Folks:
> 
> I'm just learning to use AB and have encountered some logic I don't
> understand.  In IB, I mistakenly pasted a formula over the Built-in formula
> for Equity Line and tried to "Apply" it.  There were some interpreter errors
> reported, at which point I happened to realize that I'd put the formula in the
> wrong place: I should have instead added a new name to the Custom column and
> pasted the formula in there.  OK, no big deal since I hadn't "Save Formula"-ed
> my new formula to the Built-in Equity Line formula.
> 
> So I proceeded to make everything right by simply closing IB without saving.
> But to my dismay, when I re-opened IB there was my new formula still replacing
> the Built-in Equity Line one.  I'm positive I never told IB to save.  Why on
> earth would IB save automatically upon closing without warning me?
> 
> 1)  Is this an IB bug?  It certainly isn't traditional Windows behavior, at
> best.  At worst, it's very dangerous as in the example given above.
> 2)  How do I avoid this in the future?  I don't want any editing that I do in
> AA or IB to be autosaved, particularly if there's no warning box.
> 3)  How do I fix the now-broken Built-in Equity Line formula? Are all the
> Built-in formulas posted somewhere on the AB site?
> 
> Thanks for comments.
> 
>      -Paul 


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-- 
Terry




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