After just about wearing out my home key trying to force data load of symbols across a number of symbols and brokers I ran across this script in a post which will automate the process for you.  It's on page 6 filename "ForceLoadHistoricalData_mod.mq4"

http://www.stevehopwoodforex.com/phpBB3 … d37795daf8

If you drop it on an empty chart and it rips through every symbol in your marketwatch window and navigates back to the beginning of history for every timeframe.  It takes a bit of time but beats the heck out of doing it by hand.  In any case I figured it might help others out as well.