Use Sector Analysis to Improve Stock Trades
Before you buy a stock, first examine its industry index to determine if
the sector is in an up trend. You will increase your winning percentage
because being in the right sector is just as (if not more) important than
picking the right stock.
—Manuel Ochoa, from
The TradingMarkets.com Guide to Conquering the Markets (1999 M. Gordon Publishing Group, Malibu, Calif.).