diff --git a/app/Api/V1/Controllers/Chart/AccountController.php b/app/Api/V1/Controllers/Chart/AccountController.php
index c097ec0372..00d0e8365d 100644
--- a/app/Api/V1/Controllers/Chart/AccountController.php
+++ b/app/Api/V1/Controllers/Chart/AccountController.php
@@ -24,7 +24,6 @@ declare(strict_types=1);
 
 namespace FireflyIII\Api\V1\Controllers\Chart;
 
-use Illuminate\Http\Request;
 use FireflyIII\Api\V1\Controllers\Controller;
 use FireflyIII\Api\V1\Requests\Chart\ChartRequest;
 use FireflyIII\Enums\UserRoleEnum;
@@ -32,11 +31,13 @@ use FireflyIII\Exceptions\FireflyException;
 use FireflyIII\Models\Account;
 use FireflyIII\Models\TransactionCurrency;
 use FireflyIII\Repositories\Account\AccountRepositoryInterface;
+use FireflyIII\Support\Facades\Navigation;
 use FireflyIII\Support\Facades\Steam;
 use FireflyIII\Support\Http\Api\ApiSupport;
 use FireflyIII\Support\Http\Api\CleansChartData;
 use FireflyIII\Support\Http\Api\CollectsAccountsFromFilter;
 use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Log;
 
 /**
@@ -48,9 +49,9 @@ class AccountController extends Controller
     use CleansChartData;
     use CollectsAccountsFromFilter;
 
-    protected array $acceptedRoles            = [UserRoleEnum::READ_ONLY];
+    protected array $acceptedRoles = [UserRoleEnum::READ_ONLY];
 
-    private array                  $chartData = [];
+    private array                      $chartData = [];
     private AccountRepositoryInterface $repository;
 
     /**
@@ -100,17 +101,17 @@ class AccountController extends Controller
     private function renderAccountData(array $params, Account $account): void
     {
         Log::debug(sprintf('Now in %s(array, #%d)', __METHOD__, $account->id));
-        $currency          = $this->repository->getAccountCurrency($account);
-        $currentStart      = clone $params['start'];
-        $range             = Steam::finalAccountBalanceInRange($account, $params['start'], clone $params['end'], $this->convertToPrimary);
+        $currency     = $this->repository->getAccountCurrency($account);
+        $currentStart = clone $params['start'];
+        $range        = Steam::finalAccountBalanceInRange($account, $params['start'], clone $params['end'], $this->convertToPrimary);
+        $period       = $params['period'] ?? '1D';
 
-
-        $previous          = array_values($range)[0]['balance'];
-        $pcPrevious        = null;
+        $previous   = array_values($range)[0]['balance'];
+        $pcPrevious = null;
         if (!$currency instanceof TransactionCurrency) {
             $currency = $this->primaryCurrency;
         }
-        $currentSet        = [
+        $currentSet = [
             'label'                   => $account->name,
 
             // the currency that belongs to the account.
@@ -129,7 +130,7 @@ class AccountController extends Controller
             'end_date'                => $params['end']->toAtomString(),
             'type'                    => 'line',
             'yAxisID'                 => 0,
-            'period'                  => '1D',
+            'period'                  => $period,
             'entries'                 => [],
             'pc_entries'              => [],
         ];
@@ -141,7 +142,7 @@ class AccountController extends Controller
             $currentSet['primary_currency_decimal_places'] = $this->primaryCurrency->decimal_places;
             $pcPrevious                                    = array_values($range)[0]['pc_balance'];
         }
-
+        // create array of values to collect.
 
         while ($currentStart <= $params['end']) {
             $format                        = $currentStart->format('Y-m-d');
@@ -152,14 +153,14 @@ class AccountController extends Controller
 
 
             // do the same for the primary currency balance, if relevant:
-            $pcBalance                     = null;
+            $pcBalance = null;
             if ($this->convertToPrimary) {
                 $pcBalance                        = array_key_exists($format, $range) ? $range[$format]['pc_balance'] : $pcPrevious;
                 $pcPrevious                       = $pcBalance;
                 $currentSet['pc_entries'][$label] = $pcBalance;
             }
-
-            $currentStart->addDay();
+            $currentStart = Navigation::addPeriod($currentStart, $period);
+            // $currentStart->addDay();
         }
         $this->chartData[] = $currentSet;
     }
diff --git a/app/Http/Controllers/RuleGroup/ExecutionController.php b/app/Http/Controllers/RuleGroup/ExecutionController.php
index f066f9f1a4..80628fd116 100644
--- a/app/Http/Controllers/RuleGroup/ExecutionController.php
+++ b/app/Http/Controllers/RuleGroup/ExecutionController.php
@@ -43,7 +43,7 @@ use Illuminate\View\View;
  */
 class ExecutionController extends Controller
 {
-    private AccountRepositoryInterface $repository;
+    private readonly AccountRepositoryInterface $repository;
 
     /**
      * ExecutionController constructor.
diff --git a/tests/unit/Support/Calendar/Periodicity/BimonthlyTest.php b/tests/unit/Support/Calendar/Periodicity/BimonthlyTest.php
index b667107a3c..71bed2a545 100644
--- a/tests/unit/Support/Calendar/Periodicity/BimonthlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/BimonthlyTest.php
@@ -27,7 +27,6 @@ namespace Tests\unit\Support\Calendar\Periodicity;
 use FireflyIII\Support\Calendar\Periodicity\Bimonthly;
 use Carbon\Carbon;
 use FireflyIII\Support\Calendar\Periodicity;
-use FireflyIII\Support\Calendar\Periodicity\Interval;
 
 /**
  * @group unit-test
@@ -41,7 +40,7 @@ use FireflyIII\Support\Calendar\Periodicity\Interval;
  */
 final class BimonthlyTest extends IntervalTestCase
 {
-    public static function factory(): Interval
+    public static function factory(): Bimonthly
     {
         return new Bimonthly();
     }
diff --git a/tests/unit/Support/Calendar/Periodicity/DailyTest.php b/tests/unit/Support/Calendar/Periodicity/DailyTest.php
index 1c5dd1560c..0921b3f0a1 100644
--- a/tests/unit/Support/Calendar/Periodicity/DailyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/DailyTest.php
@@ -27,7 +27,6 @@ namespace Tests\unit\Support\Calendar\Periodicity;
 use FireflyIII\Support\Calendar\Periodicity\Daily;
 use Carbon\Carbon;
 use FireflyIII\Support\Calendar\Periodicity;
-use FireflyIII\Support\Calendar\Periodicity\Interval;
 
 /**
  * @group unit-test
@@ -41,7 +40,7 @@ use FireflyIII\Support\Calendar\Periodicity\Interval;
  */
 final class DailyTest extends IntervalTestCase
 {
-    public static function factory(): Interval
+    public static function factory(): Daily
     {
         return new Daily();
     }
diff --git a/tests/unit/Support/Calendar/Periodicity/FortnightlyTest.php b/tests/unit/Support/Calendar/Periodicity/FortnightlyTest.php
index fdb8eac236..095b11b1ac 100644
--- a/tests/unit/Support/Calendar/Periodicity/FortnightlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/FortnightlyTest.php
@@ -27,7 +27,6 @@ namespace Tests\unit\Support\Calendar\Periodicity;
 use FireflyIII\Support\Calendar\Periodicity\Fortnightly;
 use Carbon\Carbon;
 use FireflyIII\Support\Calendar\Periodicity;
-use FireflyIII\Support\Calendar\Periodicity\Interval;
 
 /**
  * @group unit-test
@@ -41,7 +40,7 @@ use FireflyIII\Support\Calendar\Periodicity\Interval;
  */
 final class FortnightlyTest extends IntervalTestCase
 {
-    public static function factory(): Interval
+    public static function factory(): Fortnightly
     {
         return new Fortnightly();
     }
diff --git a/tests/unit/Support/Calendar/Periodicity/HalfYearlyTest.php b/tests/unit/Support/Calendar/Periodicity/HalfYearlyTest.php
index f71779ce59..a30094e41f 100644
--- a/tests/unit/Support/Calendar/Periodicity/HalfYearlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/HalfYearlyTest.php
@@ -27,7 +27,6 @@ namespace Tests\unit\Support\Calendar\Periodicity;
 use FireflyIII\Support\Calendar\Periodicity\HalfYearly;
 use Carbon\Carbon;
 use FireflyIII\Support\Calendar\Periodicity;
-use FireflyIII\Support\Calendar\Periodicity\Interval;
 
 /**
  * @group unit-test
@@ -41,7 +40,7 @@ use FireflyIII\Support\Calendar\Periodicity\Interval;
  */
 final class HalfYearlyTest extends IntervalTestCase
 {
-    public static function factory(): Interval
+    public static function factory(): HalfYearly
     {
         return new HalfYearly();
     }
diff --git a/tests/unit/Support/Calendar/Periodicity/MonthlyTest.php b/tests/unit/Support/Calendar/Periodicity/MonthlyTest.php
index afe440e976..1e224da5b6 100644
--- a/tests/unit/Support/Calendar/Periodicity/MonthlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/MonthlyTest.php
@@ -27,7 +27,6 @@ namespace Tests\unit\Support\Calendar\Periodicity;
 use FireflyIII\Support\Calendar\Periodicity\Monthly;
 use Carbon\Carbon;
 use FireflyIII\Support\Calendar\Periodicity;
-use FireflyIII\Support\Calendar\Periodicity\Interval;
 
 /**
  * @group unit-test
@@ -41,7 +40,7 @@ use FireflyIII\Support\Calendar\Periodicity\Interval;
  */
 final class MonthlyTest extends IntervalTestCase
 {
-    public static function factory(): Interval
+    public static function factory(): Monthly
     {
         return new Monthly();
     }
diff --git a/tests/unit/Support/Calendar/Periodicity/QuarterlyTest.php b/tests/unit/Support/Calendar/Periodicity/QuarterlyTest.php
index 3e73794f24..4c27daea39 100644
--- a/tests/unit/Support/Calendar/Periodicity/QuarterlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/QuarterlyTest.php
@@ -27,7 +27,6 @@ namespace Tests\unit\Support\Calendar\Periodicity;
 use FireflyIII\Support\Calendar\Periodicity\Quarterly;
 use Carbon\Carbon;
 use FireflyIII\Support\Calendar\Periodicity;
-use FireflyIII\Support\Calendar\Periodicity\Interval;
 
 /**
  * @group unit-test
@@ -41,7 +40,7 @@ use FireflyIII\Support\Calendar\Periodicity\Interval;
  */
 final class QuarterlyTest extends IntervalTestCase
 {
-    public static function factory(): Interval
+    public static function factory(): Quarterly
     {
         return new Quarterly();
     }
diff --git a/tests/unit/Support/Calendar/Periodicity/WeeklyTest.php b/tests/unit/Support/Calendar/Periodicity/WeeklyTest.php
index f347d11222..23020042ce 100644
--- a/tests/unit/Support/Calendar/Periodicity/WeeklyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/WeeklyTest.php
@@ -27,7 +27,6 @@ namespace Tests\unit\Support\Calendar\Periodicity;
 use FireflyIII\Support\Calendar\Periodicity\Weekly;
 use Carbon\Carbon;
 use FireflyIII\Support\Calendar\Periodicity;
-use FireflyIII\Support\Calendar\Periodicity\Interval;
 
 /**
  * @group unit-test
@@ -41,7 +40,7 @@ use FireflyIII\Support\Calendar\Periodicity\Interval;
  */
 final class WeeklyTest extends IntervalTestCase
 {
-    public static function factory(): Interval
+    public static function factory(): Weekly
     {
         return new Weekly();
     }
diff --git a/tests/unit/Support/Calendar/Periodicity/YearlyTest.php b/tests/unit/Support/Calendar/Periodicity/YearlyTest.php
index 27fbc1c56e..36464498a8 100644
--- a/tests/unit/Support/Calendar/Periodicity/YearlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/YearlyTest.php
@@ -27,7 +27,6 @@ namespace Tests\unit\Support\Calendar\Periodicity;
 use FireflyIII\Support\Calendar\Periodicity\Yearly;
 use Carbon\Carbon;
 use FireflyIII\Support\Calendar\Periodicity;
-use FireflyIII\Support\Calendar\Periodicity\Interval;
 
 /**
  * @group unit-test
@@ -41,7 +40,7 @@ use FireflyIII\Support\Calendar\Periodicity\Interval;
  */
 final class YearlyTest extends IntervalTestCase
 {
-    public static function factory(): Interval
+    public static function factory(): Yearly
     {
         return new Yearly();
     }