Quote from stock_trad3r:
indexes are dirven mainly by fundamentals such as earnings, growth and profits. Subsequently, technicals such as double tops, double bottoms, moving averages, and so on generally don't apply to indexes such as the DOW or Spooz.
With regard to stocks, however, some technicals can be useful such as the cup and handle, which I have found to be the most reliable.
Support and resistance lines aren't very reliable.