diff --git a/backtest/html_report.go b/backtest/html_report.go
index ba9b6b8..fa6aee4 100644
--- a/backtest/html_report.go
+++ b/backtest/html_report.go
@@ -216,10 +216,7 @@ func (h *HTMLReport) writeAssetReport(name string, results []*htmlReportResult)
 
 	defer helper.CloseAndLogError(file, "unable to close asset report file")
 
-	tmpl, err := template.New("report").Parse(htmlAssetReportTmpl)
-	if err != nil {
-		return fmt.Errorf("unable to initialize asset report template: %w", err)
-	}
+	tmpl := template.Must(template.New("report").Parse(htmlAssetReportTmpl))
 
 	err = tmpl.Execute(file, model)
 	if err != nil {
@@ -248,10 +245,7 @@ func (h *HTMLReport) writeReport() error {
 
 	defer helper.CloseAndLogError(file, "unable to close main report file")
 
-	tmpl, err := template.New("report").Parse(htmlReportTmpl)
-	if err != nil {
-		return fmt.Errorf("unable to execute main report template: %w", err)
-	}
+	tmpl := template.Must(template.New("report").Parse(htmlReportTmpl))
 
 	err = tmpl.Execute(file, model)
 	if err != nil {
diff --git a/helper/README.md b/helper/README.md
index 0d691b3..fffc3bb 100644
--- a/helper/README.md
+++ b/helper/README.md
@@ -38,6 +38,7 @@ The information provided on this project is strictly for informational purposes
 - [func CheckEquals\[T comparable\]\(inputs ...\<\-chan T\) error](<#CheckEquals>)
 - [func CloseAndLogError\(closer io.Closer, message string\)](<#CloseAndLogError>)
 - [func Count\[T Number, O any\]\(from T, other \<\-chan O\) \<\-chan T](<#Count>)
+- [func DaysBetween\(from, to time.Time\) int](<#DaysBetween>)
 - [func DecrementBy\[T Number\]\(c \<\-chan T, d T\) \<\-chan T](<#DecrementBy>)
 - [func Divide\[T Number\]\(ac, bc \<\-chan T\) \<\-chan T](<#Divide>)
 - [func DivideBy\[T Number\]\(c \<\-chan T, d T\) \<\-chan T](<#DivideBy>)
@@ -348,6 +349,15 @@ fmt.Println(<- s) // 3
 fmt.Println(<- s) // 4
 ```
 
+<a name="DaysBetween"></a>
+## func [DaysBetween](<https://github.com/cinar/indicator/blob/master/helper/days_between.go#L13>)
+
+```go
+func DaysBetween(from, to time.Time) int
+```
+
+DaysBetween calculates the days between the given two times.
+
 <a name="DecrementBy"></a>
 ## func [DecrementBy](<https://github.com/cinar/indicator/blob/master/helper/decrement_by.go#L16>)