The best practice is to use forex rates directly from your broker. It's very easy to export historical rates from MetaTrader to Forex Strategy Builder.

More information about the integration of historical data in Forex Strategy Builder, the different data formats and data sources can be found in the support forum and in the following articles and tutorials:

• Data Files

• Using MetaTrader Data
• Import MetaTrader4 HST Files
• Import jForex Data Files
• Import Oanda Data Files
• Using IQFeed and eSignal Data
• Import TrueFX Data Files