diff --git a/pkg/types/kline.go b/pkg/types/kline.go
index b45bb67d0..db76aa8f2 100644
--- a/pkg/types/kline.go
+++ b/pkg/types/kline.go
@@ -355,7 +355,7 @@ func (k KLineWindow) Tail(size int) KLineWindow {
 	}
 
 	win := make(KLineWindow, size)
-	copy(win, k[length-1-size:])
+	copy(win, k[length-size:])
 	return win
 }
 
diff --git a/pkg/types/kline_test.go b/pkg/types/kline_test.go
index 3e7af5f07..9cb0c5ac9 100644
--- a/pkg/types/kline_test.go
+++ b/pkg/types/kline_test.go
@@ -9,17 +9,20 @@ import (
 func TestKLineWindow_Tail(t *testing.T) {
 	var win = KLineWindow{
 		{Open: 11600.0, Close: 11600.0, High: 11600.0, Low: 11600.0},
-		{Open: 11600.0, Close: 11600.0, High: 11600.0, Low: 11600.0},
+		{Open: 11700.0, Close: 11700.0, High: 11700.0, Low: 11700.0},
 	}
 
 	var win2 = win.Tail(1)
 	assert.Len(t, win2, 1)
+	assert.ElementsMatch(t, win2, win[1:])
 
 	var win3 = win.Tail(2)
 	assert.Len(t, win3, 2)
+	assert.ElementsMatch(t, win3, win)
 
 	var win4 = win.Tail(3)
 	assert.Len(t, win4, 2)
+	assert.ElementsMatch(t, win4, win)
 }
 
 func TestKLineWindow_Truncate(t *testing.T) {