One of the most effective and widely used technical trading tools is the simple moving average. The two averages that I looked at are 50 days and 200 days simple moving averages (SMA).
When I trade indexes, I usually look for those two averages and see how they perform over the year. A quick way to see whether it is a good entry point is to see whether the 50 days cross over and above the 200 days moving averages and via versa.
You can use google financial and other charting tools to do a quick technical analysis chart.