diff --git a/goCharts/draw.go b/goCharts/draw.go
index 93b0325..2182b3a 100644
--- a/goCharts/draw.go
+++ b/goCharts/draw.go
@@ -71,14 +71,14 @@ func Draw(symbol string) {
 	}
 }
 
-func getLastDays(len int) []string {
+func getLastDays(diff int) []string {
 	now := time.Now()
 	getDay := func(t time.Time, dif int) string {
 		return t.AddDate(0, 0, dif).Format("01/02")
 	}
 	var res []string
-	for i := 1; i <= len; i++ {
-		res = append(res, getDay(now, i-len))
+	for i := 1; i <= diff; i++ {
+		res = append(res, getDay(now, i-diff))
 	}
 	return res
 }