The monthly S&P 500 bars show why it's important to keep an eye on percentage retracement levels -- as well as chart levels. I've shown this chart before, but it's worth showing again. The 2003 S&P rally not only stalled at its early 2002 peak (near 1177) but after having retrace exactly 50% of its 2000-2002 bear market decline. Assuming the S&P breaks its 2004 low, it's logical to assume that it could retrace anywhere from 38% to 50% of its 2003 advance. Based on the retracement lines shown in the previous chart, that would call for a possible decline to the 1025-975 region (see box). That means that things will probably continue to get worse until they can start to get better.