The BKX often triggers clear buy and sell signals, either several days before the INDU and SPX have a signal, or many times, where there are no clear signals on the SPX or INDU at all.
Examples: In early Feb 2006, the SPX and INDU had no clear "buy" signals, while the BKX gave a beautiful "buy" signal on Feb 10 that preceded a nice rally in the other indices. In May 2006, the SPX did not have a "sell" signal until May 11, and the INDU May 12, after the sell off started; yet the "sell" signal triggered on the BKX on May 8, before the senior indices starting falling.
