This reflects my opinion too regarding MA crossovers - or any other “lines” or indicators fot that matter. The lines themselves mean nothing unless they are related to the characteristics of the current price movement itself. We ultimately trade the price.
The only purpose from [I]any [/I]kind of line, indicator, or anything else we place on our charts is to try to identify something significant that is (or is not) emerging or taking place within the otherwise often haphazard and erratic fluctuations in the price. This applies whether one uses indicators or so-called Price Action in one’s technical analysis.
Tommor lists some good examples of how current price activity can be viewed relative to previous levels using EMA’s. Of course, the same process is taking place when one compares current price with a support/resistance line or trendline, etc.
It should also be worth keeping in mind that use of TA should be considered with respect to the timeframe being used. For example, I do not use any MA’s under 50 periods on any particular TF as they are too slow for the TF concerned (for my purposes) - but a 50 period EMA on a 4H chart is approximate to a 200 period MA on a 1H chart. This leads to the concept of multiple TFs where one can draw rules such as “cross though the xxEMA on 1H in the same direction as the xxEMA on the 4H higher TF.”