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Notes on Padded Vs UnPadded from my data provider.
http://www.cooltrader.net/products/whatisdata.htm
At 10:47 PM 1/01/2004, you wrote:
>Chuck,
>
>My question for you, however, is how do the various indicators and moving
>average calculations deal with un-padded data holes. If I do a 5-day MA,
>for instance, and one of the days has no data, what would I get for the
>MA? Same for RSI or any other indicator. It's taken me years to get
>rid of data holes and find a data providor who will consistently pad them
>for me so that indicators and other calculations work properly (IMO).
>
>That's why I prefer unpadded data. I don't want 'artificial' data to
>affect my indicators. The MA from unpadded data represents only real
>trading days data.
>So if say there was no trading on friday, the MA would represent 5 days
>before friday (previous friday, last monday, tuesday, wed, thursday).
> From my *personal* point of view, calculation of indicators should not be
> affected by bars artificially added by padding process.
>But of course your preference may be different and you can use padded data
>and include all bars (including artificial ones with zero volume).
>
>Best regards,
>Tomasz Janeczko
>amibroker.com
>----- Original Message -----
>From: <mailto:chuck_rademacher@xxxxxxxxxx>Chuck Rademacher
>To: <mailto:amibroker@xxxxxxxxxxxxxxx>amibroker@xxxxxxxxxxxxxxx
>Sent: Wednesday, December 31, 2003 9:29 PM
>Subject: [amibroker] More on data holes - for TJ
>
>TJ,
>
>Paul's plug-in and my conversion program could, if desired, create data
>holes (consistently) for users who want them. I'm not trying to be
>funny, but it is possible to leave a hole on those days when the volume is
>zero. We can forget about why anyone would want to do this. It can be
>done and it would be 100% consistent rather than 15% consistent like it is
>for most data providors.
>
>My question for you, however, is how do the various indicators and moving
>average calculations deal with un-padded data holes. If I do a 5-day MA,
>for instance, and one of the days has no data, what would I get for the
>MA? Same for RSI or any other indicator. It's taken me years to get
>rid of data holes and find a data providor who will consistently pad them
>for me so that indicators and other calculations work properly (IMO).
>
>I could test to see how some of these calculations are affected... if only
>I had some data holes!!
>
>
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