Looks like the data downloaded was corrupted. This will be fixed if you redownload the data. To do this close Strategy Trader. Wait for about a minute for Strategy Trader to completly close from your system. Then go to Start->Programs->FXCM Strategy Trader->Quote Manager. In QuoteManager, right click on EURUSD symbol and click on "Delete Data" and delete all data. Also, right click on EURUSD symbol and click on "Clear Cache". Restart Strategy Trader again.