This is my version of walking a Bollinger Bands. I use an Ehler instantaneous 21 BB. The settings for the Bands are 0.75 deviations (detrend at +0.75), zero offset, no lower band, no basis. The result is the solid red moving average. Close your bull after a dow theory closing violation under the uptrends' detrending signal.
Moving AveragesTrend Lines

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