Because the situation is changing ...

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In the double crossover method, a bullish event is generated when a faster moving average crosses above a slower moving average (21-bar MA crosses 50-bar, or 50-bar MA crosses 200-bar). In this state, the price is likely in an established uptrend. The opposite is true when the faster slips below the slower moving average, triggering a bearish event. 

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Yes folks the stock market for some is a very entertaining / lucrative place ... CIBC sells to National Bank who then sells to RBC etc eventually the lower priced  shares end up in Frank Castle's hands .

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Enjoy every day ...  Period !