
Tickdata provides daily and intra-day data very early the next morning. Their 1-minute intraday data is cheaper than every single trade data. So, not a source of real time data but reasonably priced until you do need real time data. Yahoo Finance provides daily data available between 7 PM CST and 9 PM each evening and they also provide dividends. Google Finance provides daily data also, not sure about when it is available. 
 
Good luck. 
 

> Date: Wed, 4 Apr 2012 09:52:02 +0200
> From: sebastian.steins@gmail.com
> To: r-sig-finance@r-project.org
> Subject: [R-SIG-Finance] Data to start with?
> 
> Hi there,
> 
> does anybody know a reliable and affordable data stream for current
> (delayed) and historical market data? Budget is, approx. 100 ¤/$ per
> month and as I am currently only trying to do some research I would
> have non-professional status.
> Would be nice, if Xetra was included.
> 
> 
> Thanks for your hints!
> Sebastian
> 
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