Indicator to show bar or candle of another currency on same chart

 
Hi,

Does anyone have an indicator that will show the bar or candle of another currency on the same chart, in a separate window? For example, I would like to show GBPUSD on the top and EURUSD below, but on the same chart, so I can scroll the one chart back and forth and keep them in sync.

Thanks,
Dazzdude.