Data editing

Hi Peter1,
My understanding is that the data comes direct from the ASX, and gets updated as appropriate.
It is possible to re-download data for specific days, or for a date range. In the Data Download dialogue, just select the specific date range in question.
If the data still "appears" to be wrong, I would be wondering why it appears wrong. Maybe it isn't? It is important to use a reliable source for the "master" reference for the data. Wondering who you are using for the reference?
Cheers

I understand to requirement for "locking" the database, but on many occasions this locks in some crappy data which makes my charts look crappy and the indicator values are wrong.

I would like to be able to notify BC about the crappy data so that they might fix it and resend it to all users.

eg. I have some recent crap data on GPT after the cap restructure.  Did anyone else notice?

ps: I do become annoyed when the data is so obviously wrong and nobody takes the time to fix it.
pps: Removing bars with zero volume still leaves daily gaps and the MA's are still incorrect.


Edited by peter1 - 04 Jul 2010 at 4:31pm

Thanks for your reply Robert.
I gather that your data for GPT has no errors?

I also notice that I have been unable to connect to the BC server since Friday. If this is not corrected on Monday then I will certainly seek further assistance.

Good morning Robert. I'm much happier now.
BC finally connected to the server this morning after a few re-starts and I was able to load Fridays data.

The GPT data that is wrong are the days before and after the cap reconstruction. My data has 3 days (12,13,14/5) with zero volume and a price of 0.565. Then there are 7 bars (17/5 - 25/5) with the price of 2.825 again with zero volume.

Yesterday when I used the "Remove zero volume bars from charts option" I was left with black spaces. This stuffed my MA's as you can imagine. This morning the "remove zero bars from charts option" produces the desired charts with no blank spaces. This is good.

Obviously my software had server connection problems and they have now been resolved. I am presuming there has been some behind the scenes maintenance done. (Thank you support)

I am much happier now, like a junkie after a fix. I can proceed to do my weekly scans and prepare any orders for the week.

The incorrect GPT data is still in my database as can be seen when I uncheck the "remove zero volume bars from charts" option. Now I wonder whether this data effects my scans. I think it does. 

I've discovered why this happens. One of my daily templates includes a very faint line chart overlay of the XAO. Obviously the XAO chart has data on those days that GPT didn't trade, so GPT needs to include blank spaces in the chart. I can accept this.

Note: I use the XAO overlay so that I can quickly see if the ASX300 security is behaving in a similar manner to the index. The main benefit of this is to identify divergences and trade these opportunities.

An example: In mid Apr 10 the XAO was making a new highs above 5000, when this started to reverse at the start of May I decided to look for a few shorts to reduce my long directional exposure. The best stocks to look for shorting opportunities were those stocks that did not make new highs at this time. DOW was a good example as it did not make a new high in Apr. and broke a support line at 7.00. This XAO overlay provides a quick evaluation of a stocks performance relative to the index.

I included this note for interest to the few that have been reading my rants in this thread.