The first thing that the WMA shows is the trend.
If the moving average is going up, then the trend is ascending, or bullish. If down, then its descending, or bearish.
The second thing is the time when the chart and moving average intersect.
If the chart intersects the WMA top down, this is a signal for down trades.
If the chart intersect the WMA bottom up, this is a signal for up trades.