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Hello,
It checks only when using Database Purify tool or when you are
importing data from ASCII files and $STRICT/$ALLOWNEG modes are
off.
Best regards,Tomasz Janeczkoamibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
harveyhp
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Saturday, December 27, 2003 5:13
PM
Subject: Re: [amibroker] Nonsense Numbers
for data fields
Does AB check the consistency of OHLC
relationships on an ongoing basis, or only when using the Database Purify
tool? I ask because in Herman van den Bergen's very
helpful "Introduction to the AmiBroker AddTocomposite()" tutorial, he
advises (p.10: Which Field to use in your ATC?) "The OHLC fields have certain
mathematical relationships that restrict their use and prohibit you from
putting random numbers in all fields", and advises the use of the "X" field
designator. On this list I have seen (and borrowed) examples which
violate this, such as NH, NL assigned to "O", "C", and Adv, Dec assigned to
"H", "L". AmiBroker accepts them and runs without
complaint.
HHP
==================
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Dave Merrill
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: 25 December, 2003 2:26 PM
Subject: RE: [amibroker] Nonsense
Numbers for data fields
I
haven't done this myself, but I think there's a flag you can use in an
import format definition file that disables this checking. From the Ascii
Import docs:
<SPAN
class=776302322-25122003>
<SPAN
class=776302322-25122003>===============
<FONT
face=Arial>$ALLOWNEG Allow negative numbers in
prices.
<FONT
face=Arial>0 - do not allow negative values (default), 1 - allow negative
values in prices. This additionally switches off any checking for OHLC
relationship so you can import any data into OHLC
fields.
<FONT
face=Arial>when $ALLOWNEG is NOT specified in the ASCII importer definition
AmiBroker performs the following range checking and fixup on open, low and
high pricesif( open == 0 ) open = close;if( high < max( open,
close ) ) high = max( open, close );if( low == 0 ) low = min( open,
close )
<SPAN
class=776302322-25122003>===============
<FONT
face=Arial>Dave
<SPAN
class=776302322-25122003>
<SPAN
class=776302322-25122003>
I would like to make 2 artificial data series that will
not be logical or ."checkable" to any OHLCV sequence. That is to say,
there will be zeros which are logical values in my scheme that may fall in
any location, and the relative value of one value to another is strictly
nonsensical. In other words, I would like to turn off the usual data
"checking" schemes while I utilize my "synthetic stocks' value"I
have spent a full day attempting to fool the present checking schemes,
without success.Is there a way that the logical OHLC checking
scheme can be turned off, and on, to allow this type of data to be
acceptable & loaded? My experience is that "nonsense" data cannot be
loaded by any trickery to be handled by the wizard or the ASCII loader and
be stored in the database. I would like to negate that logic at the users
discretion.All suggestions would be appreciated. May your
Christmas season be the wondrous, beautiful, meaningful time it is
intended to be. Best Regards, Hal
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