diff --git a/components/VerbrauchCharts.tsx b/components/VerbrauchCharts.tsx
index b8fdfac..fe07d1f 100644
--- a/components/VerbrauchCharts.tsx
+++ b/components/VerbrauchCharts.tsx
@@ -22,6 +22,22 @@ function thisMonthStr(): string {
   return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}`;
 }
 
+function fmtDate(d: Date): string {
+  return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`;
+}
+
+function addDays(dateStr: string, delta: number): string {
+  const d = dateStr ? new Date(`${dateStr}T00:00:00`) : new Date();
+  d.setDate(d.getDate() + delta);
+  return fmtDate(d);
+}
+
+function addMonths(monthStr: string, delta: number): string {
+  const [y, m] = (monthStr || thisMonthStr()).split('-').map(Number);
+  const d = new Date(y, m - 1 + delta, 1);
+  return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}`;
+}
+
 const CURRENT_YEAR = new Date().getFullYear();
 const YEARS = Array.from({ length: 11 }, (_, i) => CURRENT_YEAR - i);
 
@@ -118,6 +134,25 @@ function ChartCard({ range, every, title, color, selector }: ChartCardProps) {
     fetchLaden(value);
   };
 
+  // Navigation per Pfeil: einen Tag/Monat/Jahr zurueck (-1) oder vor (+1)
+  const step = (delta: number) => {
+    let nv: string;
+    if (selector === 'month') nv = addMonths(value, delta);
+    else if (selector === 'year') nv = String(Number(value || CURRENT_YEAR) + delta);
+    else nv = addDays(value, delta); // date24 + date
+    setValue(nv);
+    fetchData(nv);
+    fetchLaden(nv);
+  };
+
+  // Vorwaerts nicht in die Zukunft
+  const canForward =
+    selector === 'month'
+      ? (value || thisMonthStr()) < thisMonthStr()
+      : selector === 'year'
+        ? Number(value || CURRENT_YEAR) < CURRENT_YEAR
+        : (value || todayStr()) < todayStr();
+
   // Jahres-Chart: Achse immer ueber das komplette Kalenderjahr -> alle 12 Monate
   // sichtbar, Restmonate bleiben ohne Balken.
   let xMin: number | undefined;
@@ -147,6 +182,17 @@ function ChartCard({ range, every, title, color, selector }: ChartCardProps) {
             {selector === 'year' && 'Jahr:'}
           </label>
 
+          {/* Pfeil zurueck */}
+          <button
+            type="button"
+            onClick={() => step(-1)}
+            aria-label="zurück"
+            title="zurück"
+            className="bg-[#85B7D7] hover:bg-[#6a9fc5] px-2.5 py-1.5 text-sm rounded shadow-sm transition-colors"
+          >
+            ◀
+          </button>
+
           {selector === 'year' ? (
             <select
               value={value}
@@ -167,6 +213,18 @@ function ChartCard({ range, every, title, color, selector }: ChartCardProps) {
               className="border border-gray-400 rounded px-3 py-1.5 text-sm focus:outline-none focus:ring-2 focus:ring-gray-500"
             />
           )}
+
+          {/* Pfeil vorwaerts (nicht in die Zukunft) */}
+          <button
+            type="button"
+            onClick={() => step(1)}
+            disabled={!canForward}
+            aria-label="vorwärts"
+            title="vorwärts"
+            className="bg-[#85B7D7] hover:bg-[#6a9fc5] px-2.5 py-1.5 text-sm rounded shadow-sm transition-colors disabled:opacity-40 disabled:cursor-not-allowed"
+          >
+            ▶
+          </button>
         </div>
 
         <button