diff --git a/app/Http/Controllers/Single/SingleOrderController.php b/app/Http/Controllers/Single/SingleOrderController.php
index 9dfc922..62859d8 100644
--- a/app/Http/Controllers/Single/SingleOrderController.php
+++ b/app/Http/Controllers/Single/SingleOrderController.php
@@ -113,7 +113,7 @@ class SingleOrderController extends Controller
             if ($data['direction'] == 1) {
 
                 $data['service_charge_percentage'] = isset($data['fee_free']) && $data['fee_free'] === true ? 0 : ($data['product']['percent_fee_buy']) * $data['number'];
-                $data['difference'] = $data['fee'] = $data['product']['cash_fee_buy'];
+                $data['difference'] = $data['fee'] = $this->resolveCashSpread($config, $data['product'], 1);
                 $data['total_fee'] = $data['number'] * $data['fee'];
                 $data['price_original'] = $data['product']['price'] + $data['product']['price_profit'];
                 $data['total_price_original'] = $data['product']['amount'] * ($data['price_original'] ?? 0);
@@ -131,7 +131,7 @@ class SingleOrderController extends Controller
             } // Check if the user wants to sell
             else if ($data['direction'] == 2) {
                 $data['service_charge_percentage'] = isset($data['fee_free']) && $data['fee_free'] === true ? 0 : ($data['product']['percent_fee_sell']) * $data['number'];
-                $data['difference'] = $data['fee'] = $data['product']['cash_fee_sell'];
+                $data['difference'] = $data['fee'] = $this->resolveCashSpread($config, $data['product'], 2);
                 $data['total_fee'] = $data['number'] * $data['fee'];
                 $data['price_original'] = $data['product']['price'] + $data['product']['price_profit'];
                 $data['total_price_original'] = $data['product']['amount'] * ($data['price_original'] ?? 0);
@@ -156,10 +156,10 @@ class SingleOrderController extends Controller
                 throw new UnprocessableEntityHttpException('محصول آبشده یافت نشد.');
             }
             if ($data['direction'] == 1) {
-                $data['difference'] = $data['product']['cash_fee_buy'];
+                $data['difference'] = $this->resolveCashSpread($config, $data['product'], 1);
                 $data['service_charge_percentage'] = $data['product']['percent_fee_buy'];
             } elseif ($data['direction'] == 2) {
-                $data['difference'] = $data['product']['cash_fee_sell'];
+                $data['difference'] = $this->resolveCashSpread($config, $data['product'], 2);
                 $data['service_charge_percentage'] = $data['product']['percent_fee_sell'];
             }
             $data['total_fee'] = $data['amount'] * $data['difference'];
@@ -702,4 +702,26 @@ class SingleOrderController extends Controller
     {
         return 'موجودی ' . self::metalTypeLabel() . ' شما کمتر از میزان سفارش است';
     }
+
+    /**
+     * گلد علی / zaarbox / main_product: اختلاف سفارش = buy_fee/sell_fee نمایش (مثل /api/price/last).
+     * montzar و بقیه: همان cash_fee_buy/sell محصول (رفتار قبلی ابشده‌خانگی).
+     */
+    private function resolveCashSpread(ConfigService $config, Product $product, int $direction): float
+    {
+        $provider = $config->priceProvider();
+        $alignWithDisplay = in_array($provider, ['zaarbox', 'main_product'], true);
+
+        if ($alignWithDisplay) {
+            $display = $direction === 1
+                ? $config->displayBuySpreadRial()
+                : $config->displaySellSpreadRial();
+
+            if ($display > 0) {
+                return $display;
+            }
+        }
+
+        return (float) ($direction === 1 ? $product->cash_fee_buy : $product->cash_fee_sell);
+    }
 }
diff --git a/app/Http/Controllers/Site/ReportController.php b/app/Http/Controllers/Site/ReportController.php
index 657e37a..29e0f1a 100644
--- a/app/Http/Controllers/Site/ReportController.php
+++ b/app/Http/Controllers/Site/ReportController.php
@@ -519,9 +519,9 @@ class ReportController extends Controller
             $storedPrice = $lastPrice ?? Price::latest()->first();
             if ($storedPrice && (float) $storedPrice->price > 0) {
                 $base = (float) $storedPrice->price;
-                $sell = $open_sell ? (int) ceil($base - $difference) : 0;
-                $buy = $open_buy ? (int) ceil($base + $difference) : 0;
-                $priceLast = (int) ceil($base + $difference);
+                $sell = $open_sell ? (int) ceil($base - $diff_sell) : 0;
+                $buy = $open_buy ? (int) ceil($base + $diff_buy) : 0;
+                $priceLast = (int) ceil($base + $diff_buy);
             }
         }
 
diff --git a/app/Services/ConfigService.php b/app/Services/ConfigService.php
index aff0797..04e2ace 100644
--- a/app/Services/ConfigService.php
+++ b/app/Services/ConfigService.php
@@ -56,6 +56,24 @@ class ConfigService
         return (int) ($value === false || $value === null || $value === '' ? $default : $value);
     }
 
+    /** اختلاف خرید نمایش (/api/price/last) — fee_single / buy_fee */
+    public function displayBuySpreadRial(): float
+    {
+        $feeSingle = (float) $this->get('fee_single', 0);
+        $buyFee = (float) $this->get('buy_fee', $feeSingle);
+
+        return $buyFee > 0 ? $buyFee : $feeSingle;
+    }
+
+    /** اختلاف فروش نمایش — fee_single / sell_fee */
+    public function displaySellSpreadRial(): float
+    {
+        $feeSingle = (float) $this->get('fee_single', 0);
+        $sellFee = (float) $this->get('sell_fee', $feeSingle);
+
+        return $sellFee > 0 ? $sellFee : $feeSingle;
+    }
+
     /**
      * تنها منبع فعال قیمت — فقط یکی از: montzar | etehadie | taban_gohar | main_product
      *