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clearinghouse

Registered: Aug 2010
Posts: 572

04-21-12 05:57 AM

Do any of you have any preferred/favorite apps for synchronizing the clock? I'd be thrilled if I could get as close as possible to the exchange (NASDAQ) clock, but would settle for an accuracy of around even 200ms or worse.

Note that I am not colocated. This is for retail trading purposes, so I can match up live activity with downloaded, accurate data.

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rwk

Registered: Dec 2003
Posts: 983

04-21-12 06:00 AM

I use nistime and recommend it highly: http://www.nist.gov/pml/div688/grp40/its.cfm

It's free, works well, and has source code if you need that.

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brownsfan019

Registered: Jun 2005
Posts: 2869

04-21-12 03:17 PM

My trading machines use this: http://www.thinkman.com/dimension4/

Runs light, does the job.

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jficquette

Registered: Jun 2002
Posts: 4396

04-21-12 03:38 PM

Quote from clearinghouse:

Do any of you have any preferred/favorite apps for synchronizing the clock? I'd be thrilled if I could get as close as possible to the exchange (NASDAQ) clock, but would settle for an accuracy of around even 200ms or worse.

Note that I am not colocated. This is for retail trading purposes, so I can match up live activity with downloaded, accurate data.

Can't get any closer than 1.5 secs using internet sync.

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vikana
Moderator

Registered: Apr 2001
Posts: 1555

04-21-12 04:15 PM

I ended up simply changing the default time sync setting in Windows 7. Here are the instructions I found some place on the web:

You can alter the time sync via the Registry. Navigate to the following in
the Registry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient
(SpecialPollInterval)

Right click on 'SpecialPollInterval' in the right hand column and select
Modify>Decimal. The decimal number is in seconds. I have that value set to
86400 (24 hours).

Please backup the Registry beforehand.

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rwk

Registered: Dec 2003
Posts: 983

04-21-12 05:21 PM

You didn't mention what OS you're running, but you should be aware that if you are running Windows and any Java applications (e.g. Interactive Brokers' TWS), starting the Java app throws your system clock off. I am amazed that this problem hasn't been fixed or even discussed much. There is a workaround, but finding instructions that make sense is difficult. I got my system (Win7, 64-bit) patched, but I cannot remember the steps.

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