i was looking to backtest an emini system using 10 minute intraday charts. i ran a backtest using open tick which is a financial datafeed company and used it to feed a platform called sierra charts. the data i got was mixed and seriously flawed. for the month of jan. and feb of this year alone some of the indivual price bars created showed no volitility at all. this was during the peak trading hours from 9:30 eastern time to 4:15. i knew it was flawed because there is no way the dow eminis for example can have absolutely no price movement in a 10 minute time frame during the day session. have any of my fellow traders out there experience the same problem? can anyone here help me get some reliable data?