[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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



PureBytes Links

Trading Reference Links

/* 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;



Please note that this group is for discussion between users only.

To get support from AmiBroker please send an e-mail directly to 
SUPPORT {at} amibroker.com

For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/

For other support material please check also:
http://www.amibroker.com/support.html
 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/amibroker/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/amibroker/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:amibroker-digest@xxxxxxxxxxxxxxx 
    mailto:amibroker-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    amibroker-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/