For 5/20/2011:

If the Robot is long, XLU.
If the Robot is short, XLF.

Also, after reviewing the Robot and my own sector history in more detail, it would be a mistake attempting to set the same price targets. I would recommend either placing a limit order at yesterday's closing price on a selected sector, or trying to enter the trade when IWM goes into position (some kind of conditional order).

But the volume disparities seem to constrain the sectors from making the leap into the sweet spot that the Robot is targeting for IWM.

I was making it more complicated than necessary. The sectors are ALREADY primed to spring when the Robot generates a signal.

Tim