I've shown this chart before, because it works so well. It's a 240 minute (4 hour) chart of the DJIA.
If you insisted on one stand-alone chart for all of your timing, I'd be hard pressed to suggest a better one then the one above. As of today's open, it will take about a 65 point drop from current levels to flip the trend from up to down. Four hours is a long time, an eternity in futures and/or options, so this may not be practical for short-term trading. But it is an effective compass for directional purposes, which if you think about it, is holy grail enough.........until something better comes along.