SPY using SCTR stockcharts technical rank

In this chart of SPY the black SCTR line was placed over the red price line.
As you can see there are many times that the SCTR will give you a heads up on the direction of SPY.
See both the red and green sloping lines drawn in on the SCTR line.
The SCTR is provided by StockCharts.com
You can see their formula in their chartschool section of their website which is very informative.
Just another tool in the toolbox.

Past performance is not indicative of future results.