My current study has been the BB MACD.......I have seen it popularized by NexGen and more recently by New Futures Trading among others......FatTails has come up with a very nice version of this indicator AND the Wizard has been tweaking it a bit for us.......
One trade that I particuliarly like is shown on the attached screenshot........wait for the macd dot to exceed the bb band...then pullback........that is the trade.......there were two nice ones in todays afternoon session on CL.
I've attached a pdf that I found on the web of Nex Gen user guide......very good basic trading information.