[amibroker] real time data error

["fox97us" <dec2003@xxxxxxxxx>]

Hello,

   I aquired real time data from qcharts. However, i found the serve 
changed the data sometime. 

  My system set out a buy signal during the trading time. However, at 
the end of the day, when i used the same program to do scan, the buy 
signal did not show up. When I checked back carefully, I found the data 
are different with the one I got in the morning.

   How often this kind data error will happen? Which data source 
provides a more reliable data?

thanks



  





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