Try: 1min NYSE TICK with 3 bar EMA(for smoothing the visual), 60 pd bollinger bands(60,2,-2), horizontal line a "0". Observe this for a couple weeks in relation to S&P and Dow intraday. Good luck.
See image below.
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<img src="http://www.elitetrader.com/vb/attachment.php?s=&postid=291079">