diff --git a/app/Generator/Chart/PiggyBank/ChartJsPiggyBankChartGenerator.php b/app/Generator/Chart/PiggyBank/ChartJsPiggyBankChartGenerator.php
deleted file mode 100644
index 2908fa0661..0000000000
--- a/app/Generator/Chart/PiggyBank/ChartJsPiggyBankChartGenerator.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-/**
- * ChartJsPiggyBankChartGenerator.php
- * Copyright (C) 2016 thegrumpydictator@gmail.com
- *
- * This software may be modified and distributed under the terms of the
- * Creative Commons Attribution-ShareAlike 4.0 International License.
- *
- * See the LICENSE file for details.
- */
-
-declare(strict_types = 1);
-namespace FireflyIII\Generator\Chart\PiggyBank;
-
-use Carbon\Carbon;
-use Illuminate\Support\Collection;
-
-
-/**
- * Class ChartJsPiggyBankChartGenerator
- *
- * @package FireflyIII\Generator\Chart\PiggyBank
- */
-class ChartJsPiggyBankChartGenerator implements PiggyBankChartGeneratorInterface
-{
-
-    /**
-     * @param Collection $set
-     *
-     * @return array
-     */
-    public function history(Collection $set): array
-    {
-
-        // language:
-        $format = (string)trans('config.month_and_day');
-
-        $data = [
-            'count'    => 1,
-            'labels'   => [],
-            'datasets' => [
-                [
-                    'label' => 'Diff',
-                    'data'  => [],
-                ],
-            ],
-        ];
-        $sum  = '0';
-        foreach ($set as $key => $value) {
-            $date                          = new Carbon($key);
-            $sum                           = bcadd($sum, $value);
-            $data['labels'][]              = $date->formatLocalized($format);
-            $data['datasets'][0]['data'][] = round($sum, 2);
-        }
-
-        return $data;
-    }
-}
diff --git a/app/Generator/Chart/PiggyBank/PiggyBankChartGeneratorInterface.php b/app/Generator/Chart/PiggyBank/PiggyBankChartGeneratorInterface.php
deleted file mode 100644
index 2841cd928e..0000000000
--- a/app/Generator/Chart/PiggyBank/PiggyBankChartGeneratorInterface.php
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-/**
- * PiggyBankChartGeneratorInterface.php
- * Copyright (C) 2016 thegrumpydictator@gmail.com
- *
- * This software may be modified and distributed under the terms of the
- * Creative Commons Attribution-ShareAlike 4.0 International License.
- *
- * See the LICENSE file for details.
- */
-
-declare(strict_types = 1);
-
-namespace FireflyIII\Generator\Chart\PiggyBank;
-
-use Illuminate\Support\Collection;
-
-/**
- * Interface PiggyBankChartGeneratorInterface
- *
- * @package FireflyIII\Generator\Chart\PiggyBank
- */
-interface PiggyBankChartGeneratorInterface
-{
-    /**
-     * @param Collection $set
-     *
-     * @return array
-     */
-    public function history(Collection $set): array;
-}
diff --git a/app/Http/Controllers/Chart/PiggyBankController.php b/app/Http/Controllers/Chart/PiggyBankController.php
index bdcf1408f5..aa11d8bbf0 100644
--- a/app/Http/Controllers/Chart/PiggyBankController.php
+++ b/app/Http/Controllers/Chart/PiggyBankController.php
@@ -13,13 +13,12 @@ declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers\Chart;
 
-use FireflyIII\Generator\Chart\PiggyBank\PiggyBankChartGeneratorInterface;
+use FireflyIII\Generator\Chart\Basic\GeneratorInterface;
 use FireflyIII\Http\Controllers\Controller;
 use FireflyIII\Models\PiggyBank;
 use FireflyIII\Models\PiggyBankEvent;
 use FireflyIII\Repositories\PiggyBank\PiggyBankRepositoryInterface;
 use FireflyIII\Support\CacheProperties;
-use Illuminate\Support\Collection;
 use Response;
 
 
@@ -31,7 +30,7 @@ use Response;
 class PiggyBankController extends Controller
 {
 
-    /** @var PiggyBankChartGeneratorInterface */
+    /** @var GeneratorInterface */
     protected $generator;
 
     /**
@@ -41,7 +40,7 @@ class PiggyBankController extends Controller
     {
         parent::__construct();
         // create chart generator:
-        $this->generator = app(PiggyBankChartGeneratorInterface::class);
+        $this->generator = app(GeneratorInterface::class);
     }
 
     /**
@@ -56,26 +55,24 @@ class PiggyBankController extends Controller
     {
         // chart properties for cache:
         $cache = new CacheProperties;
-        $cache->addProperty('piggy-history');
+        $cache->addProperty('chart.piggy-bank.history');
         $cache->addProperty($piggyBank->id);
         if ($cache->has()) {
             return Response::json($cache->get());
         }
 
-        $set        = $repository->getEvents($piggyBank);
-        $set        = $set->reverse();
-        $collection = [];
+        $set       = $repository->getEvents($piggyBank);
+        $set       = $set->reverse();
+        $chartData = [];
+        $sum       = '0';
         /** @var PiggyBankEvent $entry */
         foreach ($set as $entry) {
-            $date   = $entry->date->format('Y-m-d');
-            $amount = $entry->amount;
-            if (isset($collection[$date])) {
-                $amount = bcadd($amount, $collection[$date]);
-            }
-            $collection[$date] = $amount;
+            $label             = $entry->date->formatLocalized(strval(trans('config.month_and_day')));
+            $sum               = bcadd($sum, $entry->amount);
+            $chartData[$label] = $sum;
         }
 
-        $data = $this->generator->history(new Collection($collection));
+        $data = $this->generator->singleSet($piggyBank->name, $chartData);
         $cache->store($data);
 
         return Response::json($data);