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I Agree with Chuck here,
Why on earth you would want unpadded data is beyond me. (For the
reason of disrupting indicators).
With unpadded data, If a stock simply had no trades for the day, then it
would be ommited from the unpadded list of stocks. Not just wether it was
actualy able to trade that day (Suspended or whatever).
When I want a MA of the last 3 trading days - If I don't average in the day
with 0 trades, Im not realy getting an MA of the last 3 days.
Michael.
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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