The moving average fifty does help as the boundary between bullish and bearish zones.
Usually, the bullish motive (waves one to five or the bullish trend)) stays above a rising moving average fifty. Also, the first leg of the corrective phase after the bullish trend will finally close below MA 50.
Obviously, things do not always play like that all the time, but it is important to know. Note that, the bearish motive (waves one to five) stays below a declining moving average fifty.
Please understand that, one that is using the moving average 50 should always remember to draw trend lines, channels and key levels. I have already barked about that issue when I was writing about the moving average 100.
Last point, one must always keep eyes on the the slope of the moving average 50.
Usually, when MA 50 is sloping up, it indicates that the price is more likely to break resistances ahead. The opposite is also true if it is sloping down. One that wants to trade MA 50's slope ought to master the breakout trading.