Taw 55,
The best indicator I know for sector rotation is relative strength.
The best book I know on the topic for multi-month investment timeframes is by Michael J Corr:
http://www.amazon.com/Smarter-Invest...2853400&sr=1-1
But the paradox for short term trading is that you must buy the worst short term RS sectors on a 20 DMF buy signal when confirmed by Pascal’s sector lists.
Billy