### Comment:
its called thinkorswim brahski 
  
 you can run real time simulations of trading days, minute by minute for the whole market

### REPLY:
&gt;minute by minute 
  
 Yes, but sub-second historical data is not cheap though.  
  
 Institutions pay hundred thousand plus for a data set, and are typically bound by agreements that say the exchange still owns it.

### END.