Yes there is. --> go to
www.futuresource.com. Go to charts. When you want to see a spread chart just type in the spread in the "Contract" box. For example for the wn6/wh6 wheat spread, you would type in "wn6-wh6". Go down and change the period to daily, keep scrolling down and you can add both bollinger bands and rsi. And it's free - if you register you can save the spread charts to "workspaces" where you don't have to type in the spreads each time you want to look at them. Check it out and welcome to the board.