Thanks Spectre2007, I am using CQG demo free data with NT. And for one strategy (Intraday price action and 3 EMAs for trend) it shows great results for 2007-2008, but 2009-2015, the results is just not good. I am starting to question can I really trust free CQG demo data. They provide on 1 minute OHLC data. CQG demo data goes back to 2006.