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bidBar hourly data behind 1 hour in api vs. chart?
cnt64
 Post subject: bidBar hourly data behind 1 hour in api vs. chart? Post rating: 0   New post Posted: Mon 27 May, 2013, 23:43 
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Hello,

when reading bidBar data (close, open) I get different values than on the chart. It seems the data from the api are one hour behind the data on the chart.
E.g. on the USD/JPY chart from Jan. 2010 onn 15th 0:00:
The chart reads bidBar.close = 91.23. (see chart)
The api returns 91.27 which is the close from 14th, 23:00. The log entry comes from the code snippet attached.

What am I doing wrong? Or is that a bug?

Many thanks in advance!


Attachments:
USDJPY_Chart_201001.png [36.66 KiB]
Downloaded 363 times
File comment: Log entry
Fri Jan 15 00:00:00 CET 2010c = 91.27 o = 91.24
Log_Screenshot.png [46.36 KiB]
Downloaded 357 times
File comment: log entry stems comes from:
log(new Date(bidBar.getTime()) + "c = " + bidBar.getClose() + " o = " + bidBar.getOpen());
Code_Snipptet.png [35.67 KiB]
Downloaded 354 times
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cnt64
 Post subject: Re: bidBar hourly data behind 1 hour in api vs. chart? Post rating: 0   New post Posted: Wed 05 Jun, 2013, 21:56 
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Hello Dukascopy Support,

do you need additional information?

Best regards,
cnt64
 
tcsabina
 Post subject: Re: bidBar hourly data behind 1 hour in api vs. chart? Post rating: 1   New post Posted: Fri 07 Jun, 2013, 12:21 
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Joined: Mon 08 Oct, 2012, 10:35
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Hi,

I am not sure if
new Date(bidBar.getTime())

is also a good and proper way to get the time of the bar, but what I use SimpleDateFormat, which is described here: https://www.dukascopy.com/wiki/#Format_Date_Time

There is another wiki page that contains a checklist that you have to consider when comparing chart data with strategy calculations:
https://www.dukascopy.com/wiki/#Indicato ... _checklist

I also must say that you probably have better chances for support and help, if you provide the complete strategy. As currently it is not visible where (in what context) do you call your log() functions, etc.

And at last, this is definitely an Automated Trading issue. Normally API Support picks up these threads within 1-3 days.
The thread is currently in the Trading Platform`s Bug Report section, which is handled by Desktop Support, but Desktop Support (sadly) is ridiculously slow in response times...
I suggest to wait till mid-next week (as there is no support on the weekend at all), and if there is no response, re-post in the Automated Trading section.
 
cnt64
 Post subject: Re: bidBar hourly data behind 1 hour in api vs. chart? Post rating: 0   New post Posted: Fri 07 Jun, 2013, 21:46 
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Hi tcsabina,

many thanks for the hints!
I checked the date stuff and that seems to be the problem. When using Date class I'm not able to change the timezone. The default timezone of Date class is GMT but if my machine uses a different timezone, a conversion will take place. If I use SimpleDateFormat and set the timezone the bid/ask Bar time conforms the chart.
Since the difference of time is seen on the chart, I thought this is a trading platform issue.

And many thanks for the heads-up on the support response time!
 
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