exp. last value and test.

exp_moving_average_series.go

@@ -78,7 +78,13 @@ func (mas ExponentialMovingAverageSeries) GetLastValue() (x float64, y float64)
 		return
 	}
 
-	return 0.0, 0.0 //this one is going to be a bitch.
+	seriesLength := mas.InnerSeries.Len()
+	for index := 0; index < seriesLength; index++ {
+		x, _ = mas.GetValue(index)
+	}
+
+	y = mas.valueBuffer[seriesLength-1]
+	return
 }
 
 // Render renders the series.

exp_moving_average_series_test.go

@@ -28,4 +28,8 @@ func TestExponentialMovingAverageSeries(t *testing.T) {
 
 	assert.Equal(10.0, yvalues[0])
 	assert.True(math.Abs(yvalues[9]-3.77) < 0.01)
+
+	lvx, lvy := mas.GetLastValue()
+	assert.Equal(10.0, lvx)
+	assert.True(math.Abs(lvy-3.77) < 0.01)
 }