diff --git a/component/sparkline/sparkline.go b/component/sparkline/sparkline.go
index ed26966..b0451e1 100644
--- a/component/sparkline/sparkline.go
+++ b/component/sparkline/sparkline.go
@@ -121,4 +121,5 @@ func (s *SparkLine) Draw(buffer *ui.Buffer) {
 	}
 
 	s.Block.Draw(buffer)
+	component.RenderAlert(s.alert, s.Rectangle, buffer)
 }
diff --git a/component/util/parse_test.go b/component/util/parse_test.go
index b8b6028..c5f87da 100644
--- a/component/util/parse_test.go
+++ b/component/util/parse_test.go
@@ -13,7 +13,7 @@ func TestParseFloat(t *testing.T) {
 		wantErr bool
 	}{
 		{"should parse a regular number", args{"123"}, 123, false},
-		{"should parse a regular number with spaces", args{" 123 "}, 123, false},
+		{"should parse a regular number with spaces, tabs and line breaks", args{"         \t 123 \t \n    "}, 123, false},
 		{"should parse a last line in the given string", args{"123\n456"}, 456, false},
 	}
 	for _, tt := range tests {
diff --git a/data/item.go b/data/item.go
index d588200..c2cd5ca 100644
--- a/data/item.go
+++ b/data/item.go
@@ -60,13 +60,13 @@ func (i *Item) nextValue(variables []string) (string, error) {
 	if i.InitScript != nil {
 		return i.executeInteractiveShellCmd(variables)
 	} else {
-		return i.executeCmd(variables)
+		return i.executeCmd(variables, i.SampleScript)
 	}
 }
 
-func (i *Item) executeCmd(variables []string) (string, error) {
+func (i *Item) executeCmd(variables []string, script string) (string, error) {
 
-	cmd := exec.Command("sh", "-c", i.SampleScript)
+	cmd := exec.Command("sh", "-c", script)
 	enrichEnvVariables(cmd, variables)
 
 	output, err := cmd.Output()
@@ -75,7 +75,7 @@ func (i *Item) executeCmd(variables []string) (string, error) {
 		return "", err
 	}
 
-	return strings.TrimSpace(string(output)), nil
+	return string(output), nil
 }
 
 func (i *Item) initInteractiveShell(variables []string) error {
@@ -167,13 +167,11 @@ func (i *Item) executeInteractiveShellCmd(variables []string) (string, error) {
 
 func (i *Item) transformInteractiveShellCmd(sample string) (string, error) {
 
-	result := sample
-
-	if i.TransformScript != nil {
-		result = result // TODO
+	if i.TransformScript != nil && len(sample) > 0 {
+		return i.executeCmd([]string{"sample=" + sample}, *i.TransformScript)
 	}
 
-	return result, nil
+	return sample, nil
 }
 
 func enrichEnvVariables(cmd *exec.Cmd, variables []string) {