All indicators do is highlight information that is already visible on the price chart. That is why you need to be careful making decisions based solely on an indicator — because when you summarize (information) you sacrifice. 63-Day Twiggs Momentum displays a bearish divergence, with declining peaks over the last two years while the index has been rising. Careful study of the price chart reveals the same information: a healthy trend should display symmetrical, equally-weighted corrections and advances, you can tell momentum is slowing when advances are weaker and corrections stronger. A trend reversal would only be clear on the monthly chart if the S&P 500 crossed below support at 1100, but declining momentum should warn well in advance that it is forming a top. Recovery above 1400 is unlikely, but would signal that the trend has regained momentum — especially if the Fed introduces QE3.
The Nasdaq 100 is also losing momentum, but slightly. Respect of support at 2400 would indicate a healthy up-trend. Likewise a trough above zero on 63-day Twiggs Momentum.
* Target calculation: 2800 + ( 2800 – 2400 ) = 3200