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Re: [amibroker] I am suspicious that I found an AFL AB bug



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without providing any information on how Jstop is calculated this
output means very little, just shows a fault in your calculation
I wonder why you used debug when you could easily just explore for the results

-- 
Cheers
Graham
AB-Write >< Professional AFL Writing Service
Yes, I write AFL code to your requirements
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On 29/05/07, indo26_slate <indo26_slate@xxxxxxxxxxxx> wrote:
> /* Program:     atr_values_test
> ** Author:      Joshua Chellew
> ** Purpose:     To understand the state of arrays. I wrote this
> program in order to get a better understanding
> **                              of the runtime behaviour and how it
> works on the state of arrays
> ** Findings:    I suspect I may have found a bug. The value of Jstop
> [1] is unexpected. I expected Jstop[1] to have
> **                              the value '0'. I used a 3rd party
> utility called 'DebugView' in order to read the _TRACE calls. I
> **                              ran this AFL program as a weekly
> system on 1 ticker/company. When I ran a scan, this is what I found:
> **
>                                         [2524] at the start of 'ATR
> Values test' program
>                                         [2524] Close[0] = 13.3582,
> Jstop[0] = 13.3582
>                                         [2524] Close[1] = 13.2819,
> Jstop[1] = 2.29594e-038
>                                         [2524] Close[2] = 13.1778,
> Jstop[2] = 0
>                                         [2524] Close[3] = 13.1708,
> Jstop[3] = 0
>                                         [2524] Close[4] = 12.8447,
> Jstop[4] = 0
>
>                                         ..........
>
>
>                                         ..........
>
>
>                                         [2524] Close[201] = 8, Jstop
> [201] = 0
>                                         [2524] Close[202] = 8.29,
> Jstop[202] = 0
>                                         [2524] Close[203] = 8.36,
> Jstop[203] = 0
>                                         [2524] Close[204] = 8.43,
> Jstop[204] = 0
>                                         [2524] Close[205] = 8.38,
> Jstop[205] = 0
>                                         [2524] Close[206] = 8.39,
> Jstop[206] = 0
>
> **
> **                      You will notice Jstop[1] has a
> value '2.29594e-038' which I find strange and unexpected because the
> program
> **                      only assigns Jstop[0]. It does not assign
> Jstop[1] and therefore I expect it's value to be '0'. I can't find
> **                      any explanation other than a bug in AFL/AB.
> */
>
>
> _TRACE("at the start of 'ATR Values test' program");
>
> Jstop[0] = Close[0];
>
> for(i = 0; i < BarCount - 1; i++)
> {
>         _TRACE("Close["+ i +"] = " + Close[i] +
>                         ", Jstop["+ i +"] = " + Jstop[i]);
> }
>
> Buy = 0;
> Sell = 0;
>


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