diff --git a/.devcontainer/ui-lovelace.yaml b/.devcontainer/ui-lovelace.yaml
index 86d94f3..1de12a0 100644
--- a/.devcontainer/ui-lovelace.yaml
+++ b/.devcontainer/ui-lovelace.yaml
@@ -24,4 +24,9 @@ views:
             name: test2
             type: bar
         hours_to_show: 0.25
-        cache: true
\ No newline at end of file
+        cache: true
+      - type: custom:apexcharts-card
+        hours_to_show: 0.25
+        series:
+          - entity: sensor.humidity
+            # extend_to_end: true
\ No newline at end of file
diff --git a/src/apexcharts-card.ts b/src/apexcharts-card.ts
index 843a36c..38d11f8 100644
--- a/src/apexcharts-card.ts
+++ b/src/apexcharts-card.ts
@@ -107,6 +107,9 @@ class ChartsCard extends LitElement {
       useCompress: false,
       ...JSON.parse(JSON.stringify(config)),
     };
+    this._config?.series.map((serie) => {
+      serie.extend_to_end = serie.extend_to_end !== undefined ? serie.extend_to_end : true;
+    });
   }
 
   static get styles(): CSSResult {
@@ -240,9 +243,11 @@ class ChartsCard extends LitElement {
       const promise = this._entities.map((entity, i) => this._updateEntity(entity, i, start));
       await Promise.all(promise);
       const graphData = {
-        series: this._history.map((history) => {
+        series: this._history.map((history, index) => {
           return {
-            data: history?.data,
+            data: this._config?.series[index].extend_to_end
+              ? [...history?.data, ...[[end.getTime(), history?.data.slice(-1)[0][1]]]]
+              : history?.data,
           };
         }),
         subtitle: {
diff --git a/src/types.ts b/src/types.ts
index c4c34f0..5c17588 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -18,6 +18,7 @@ export interface ChartCardSeriesExternalConfig {
   name?: string;
   type: 'line' | 'bar' | 'area';
   curve?: 'smooth' | 'straight' | 'stepline';
+  extend_to_end?: boolean;
 }
 
 export interface ChartCardSeriesConfig extends ChartCardSeriesExternalConfig {