diff --git a/pkg/indicator/macd.go b/pkg/indicator/macd.go
index 9a50d8b04..972164b50 100644
--- a/pkg/indicator/macd.go
+++ b/pkg/indicator/macd.go
@@ -51,15 +51,6 @@ func (inc *MACD) Update(x float64) {
 	inc.Histogram.Push(macd - inc.SignalLine.Last())
 }
 
-// Deprecated -- this function is not used ??? ask @narumi
-func (inc *MACD) calculateMACD(kLines []types.KLine, priceF KLinePriceMapper) float64 {
-	for _, k := range kLines {
-		inc.PushK(k)
-	}
-
-	return inc.Values[len(inc.Values)-1]
-}
-
 func (inc *MACD) Last() float64 {
 	if len(inc.Values) == 0 {
 		return 0.0
diff --git a/pkg/indicator/macd_test.go b/pkg/indicator/macd_test.go
index 6cf074fff..0088f9db9 100644
--- a/pkg/indicator/macd_test.go
+++ b/pkg/indicator/macd_test.go
@@ -41,8 +41,9 @@ func Test_calculateMACD(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			iw := types.IntervalWindow{Window: 9}
 			macd := MACD{IntervalWindow: iw, ShortPeriod: 12, LongPeriod: 26}
-			priceF := KLineClosePriceMapper
-			got := macd.calculateMACD(tt.kLines, priceF)
+			macd.CalculateAndUpdate(tt.kLines)
+
+			got := macd.Last()
 			diff := math.Trunc((got-tt.want)*100) / 100
 			if diff != 0 {
 				t.Errorf("calculateMACD() = %v, want %v", got, tt.want)