Does anyone know how reliable is data available in the history center of mt4 when you use the download feature? I searched the threads and found few threads on improving the model quality of mt4 tester. Posters said that alpari databank contains reliable 1 minute data (for EURUSD) since 16 june of 2004. I dont really need 1 minute data, 30 minutes will suit me well. Is 30 minute data downloaded in history center reliable?