I opened a demo account at Oec I compared the graphs of the platform and the cme one (daily and hourly) and noticed some changes what is the reason? are the data sheet of Oec is not reliable or I am missing somthing?
Demo charts and data are just that - for demonstration purposes only. While I don't agree with it, OEC uses demo trades as 'fills' on demo charts so your bars/candles could be off from live data. For example, if you use a volume or tick chart intraday, your charts will look different from live charts (at times) b/c of demo fills being included.