diff --git a/metallzuschlagindex.php b/metallzuschlagindex.php
index 5415758..f1c499e 100755
--- a/metallzuschlagindex.php
+++ b/metallzuschlagindex.php
@@ -294,6 +294,7 @@ if (!empty($cablesWithKupfer) && !empty($chartData['labels'])) {
 	// Parameter auslesen
 	$cableIds = GETPOST('cable_ids', 'array');
 	$cableMode = GETPOST('cable_mode', 'alpha') ?: 'per_meter';
+	$cableFilterSubmitted = GETPOST('cable_filter', 'int');
 
 	// URL-Basis fuer Links
 	$baseUrl = $_SERVER["PHP_SELF"].'?chart_days='.$chartDays;
@@ -311,9 +312,10 @@ if (!empty($cablesWithKupfer) && !empty($chartData['labels'])) {
 
 	// Kabel-Auswahl (Checkboxen)
 	print '<div class="div-table-responsive-no-min" style="margin-bottom: 15px;">';
-	print '<form method="get" action="'.$_SERVER["PHP_SELF"].'">';
+	print '<form method="get" action="'.$_SERVER["PHP_SELF"].'" id="cableFilterForm">';
 	print '<input type="hidden" name="chart_days" value="'.$chartDays.'">';
 	print '<input type="hidden" name="cable_mode" value="'.$cableMode.'">';
+	print '<input type="hidden" name="cable_filter" value="1">';
 
 	print '<table class="noborder centpercent">';
 	print '<tr class="liste_titre">';
@@ -323,7 +325,8 @@ if (!empty($cablesWithKupfer) && !empty($chartData['labels'])) {
 
 	$colCount = 0;
 	foreach ($cablesWithKupfer as $cable) {
-		$checked = (empty($cableIds) || in_array($cable->rowid, $cableIds)) ? ' checked' : '';
+		// Beim ersten Laden alle auswaehlen, danach nur die ausgewaehlten
+		$checked = (!$cableFilterSubmitted || in_array($cable->rowid, $cableIds)) ? ' checked' : '';
 		print '<td style="width: 25%;">';
 		print '<label>';
 		print '<input type="checkbox" name="cable_ids[]" value="'.$cable->rowid.'"'.$checked.'> ';