diff --git a/apps/api/src/app/portfolio/portfolio-service.factory.ts b/apps/api/src/app/portfolio/portfolio-service.factory.ts
index e5a3eaae5..e1f21d7e0 100644
--- a/apps/api/src/app/portfolio/portfolio-service.factory.ts
+++ b/apps/api/src/app/portfolio/portfolio-service.factory.ts
@@ -1,4 +1,7 @@
-import { Injectable } from '@nestjs/common';
+import type { RequestWithUser } from '@ghostfolio/common/types';
+import { Inject, Injectable } from '@nestjs/common';
+import { REQUEST } from '@nestjs/core';
+
 import { PortfolioService } from './portfolio.service';
 import { PortfolioServiceNew } from './portfolio.service-new';
 
@@ -6,11 +9,14 @@ import { PortfolioServiceNew } from './portfolio.service-new';
 export class PortfolioServiceFactory {
   public constructor(
     private readonly portfolioService: PortfolioService,
-    private readonly portfolioServiceNew: PortfolioServiceNew
+    private readonly portfolioServiceNew: PortfolioServiceNew,
+    @Inject(REQUEST) private readonly request: RequestWithUser
   ) {}
 
   public get() {
-    if (false) {
+    if (
+      this.request.user?.Settings?.settings?.['isNewCalculationEngine'] === true
+    ) {
       return this.portfolioServiceNew;
     }
 
diff --git a/apps/api/src/app/portfolio/portfolio.service-new.ts b/apps/api/src/app/portfolio/portfolio.service-new.ts
index 736385da0..da6bd44aa 100644
--- a/apps/api/src/app/portfolio/portfolio.service-new.ts
+++ b/apps/api/src/app/portfolio/portfolio.service-new.ts
@@ -399,11 +399,12 @@ export class PortfolioServiceNew {
     aImpersonationId: string,
     aSymbol: string
   ): Promise<PortfolioPositionDetail> {
+    const userCurrency = this.request.user.Settings.currency;
     const userId = await this.getUserId(aImpersonationId, this.request.user.id);
 
-    const orders = (await this.orderService.getOrders({ userId })).filter(
-      (order) => order.symbol === aSymbol
-    );
+    const orders = (
+      await this.orderService.getOrders({ userCurrency, userId })
+    ).filter((order) => order.symbol === aSymbol);
 
     if (orders.length <= 0) {
       return {
@@ -871,24 +872,25 @@ export class PortfolioServiceNew {
   }
 
   public async getSummary(aImpersonationId: string): Promise<PortfolioSummary> {
-    const currency = this.request.user.Settings.currency;
+    const userCurrency = this.request.user.Settings.currency;
     const userId = await this.getUserId(aImpersonationId, this.request.user.id);
 
     const performanceInformation = await this.getPerformance(aImpersonationId);
 
     const { balance } = await this.accountService.getCashDetails(
       userId,
-      currency
+      userCurrency
     );
     const orders = await this.orderService.getOrders({
+      userCurrency,
       userId
     });
     const dividend = this.getDividend(orders).toNumber();
     const fees = this.getFees(orders).toNumber();
     const firstOrderDate = orders[0]?.date;
 
-    const totalBuy = this.getTotalByType(orders, currency, 'BUY');
-    const totalSell = this.getTotalByType(orders, currency, 'SELL');
+    const totalBuy = this.getTotalByType(orders, userCurrency, 'BUY');
+    const totalSell = this.getTotalByType(orders, userCurrency, 'SELL');
 
     const committedFunds = new Big(totalBuy).sub(totalSell);
 
@@ -1051,8 +1053,11 @@ export class PortfolioServiceNew {
     orders: OrderWithAccount[];
     portfolioOrders: PortfolioOrder[];
   }> {
+    const userCurrency = this.request.user?.Settings?.currency ?? baseCurrency;
+
     const orders = await this.orderService.getOrders({
       includeDrafts,
+      userCurrency,
       userId,
       types: ['BUY', 'SELL']
     });
@@ -1061,7 +1066,6 @@ export class PortfolioServiceNew {
       return { transactionPoints: [], orders: [], portfolioOrders: [] };
     }
 
-    const userCurrency = this.request.user?.Settings?.currency ?? baseCurrency;
     const portfolioOrders: PortfolioOrder[] = orders.map((order) => ({
       currency: order.currency,
       dataSource: order.SymbolProfile?.dataSource ?? order.dataSource,
diff --git a/apps/api/src/app/user/update-user-setting.dto.ts b/apps/api/src/app/user/update-user-setting.dto.ts
index a6a583138..38dc9cafb 100644
--- a/apps/api/src/app/user/update-user-setting.dto.ts
+++ b/apps/api/src/app/user/update-user-setting.dto.ts
@@ -1,6 +1,11 @@
-import { IsBoolean } from 'class-validator';
+import { IsBoolean, IsOptional } from 'class-validator';
 
 export class UpdateUserSettingDto {
   @IsBoolean()
+  @IsOptional()
+  isNewCalculationEngine?: boolean;
+
+  @IsBoolean()
+  @IsOptional()
   isRestrictedView?: boolean;
 }
diff --git a/apps/api/src/app/user/user.controller.ts b/apps/api/src/app/user/user.controller.ts
index 0a7ed21cf..adb059412 100644
--- a/apps/api/src/app/user/user.controller.ts
+++ b/apps/api/src/app/user/user.controller.ts
@@ -23,7 +23,7 @@ import {
 import { REQUEST } from '@nestjs/core';
 import { JwtService } from '@nestjs/jwt';
 import { AuthGuard } from '@nestjs/passport';
-import { Provider, Role } from '@prisma/client';
+import { Provider } from '@prisma/client';
 import { User as UserModel } from '@prisma/client';
 import { StatusCodes, getReasonPhrase } from 'http-status-codes';
 
@@ -115,6 +115,12 @@ export class UserController {
       ...data
     };
 
+    for (const key in userSettings) {
+      if (userSettings[key] === false) {
+        delete userSettings[key];
+      }
+    }
+
     return await this.userService.updateUserSetting({
       userSettings,
       userId: this.request.user.id
diff --git a/apps/client/src/app/pages/account/account-page.component.ts b/apps/client/src/app/pages/account/account-page.component.ts
index 5d1d0d5e3..df7f81beb 100644
--- a/apps/client/src/app/pages/account/account-page.component.ts
+++ b/apps/client/src/app/pages/account/account-page.component.ts
@@ -192,6 +192,24 @@ export class AccountPageComponent implements OnDestroy, OnInit {
       });
   }
 
+  public onNewCalculationChange(aEvent: MatSlideToggleChange) {
+    this.dataService
+      .putUserSetting({ isNewCalculationEngine: aEvent.checked })
+      .pipe(takeUntil(this.unsubscribeSubject))
+      .subscribe(() => {
+        this.userService.remove();
+
+        this.userService
+          .get()
+          .pipe(takeUntil(this.unsubscribeSubject))
+          .subscribe((user) => {
+            this.user = user;
+
+            this.changeDetectorRef.markForCheck();
+          });
+      });
+  }
+
   public onRedeemCoupon() {
     let couponCode = prompt('Please enter your coupon code:');
     couponCode = couponCode?.trim();
diff --git a/apps/client/src/app/pages/account/account-page.html b/apps/client/src/app/pages/account/account-page.html
index 1155741f9..081784bfb 100644
--- a/apps/client/src/app/pages/account/account-page.html
+++ b/apps/client/src/app/pages/account/account-page.html
@@ -135,6 +135,23 @@
               ></mat-slide-toggle>
             </div>
           </div>
+          <div
+            *ngIf="user?.subscription"
+            class="align-items-center d-flex mt-4 py-1"
+          >
+            <div class="pr-1 w-50">
+              <div i18n>New Calculation Engine</div>
+              <div class="hint-text text-muted" i18n>Experimental</div>
+            </div>
+            <div class="pl-1 w-50">
+              <mat-slide-toggle
+                color="primary"
+                [checked]="user.settings.isNewCalculationEngine"
+                [disabled]="!hasPermissionToUpdateUserSettings"
+                (change)="onNewCalculationChange($event)"
+              ></mat-slide-toggle>
+            </div>
+          </div>
         </mat-card-content>
       </mat-card>
     </div>