I learned this idea from my stock buddy, Judy. Whenever a rising stock or index floats above its rising simple 4 week average (the weekly low is well above the average), that security often times is extended and it reverts to the average. This weekly chart of the SPY shows times in the recent past when this index ETF has become extended according to this definition. The red dotted line is the 4 week average. We may be facing a consolidation or brief pause now as DIA and QQQ are also showing this pattern.