diff --git a/modules/purchase_trade/purchase.py b/modules/purchase_trade/purchase.py
index e610c8c..a8da140 100755
--- a/modules/purchase_trade/purchase.py
+++ b/modules/purchase_trade/purchase.py
@@ -296,30 +296,38 @@ class Purchase(metaclass=PoolMeta):
     lc_date = fields.Date("LC date")
     product_origin = fields.Char("Origin")
 
-    def get_company_info(self,name):
-        return (self.company.party.name == 'MELYA')
-
-    @fields.depends('party', '_parent_party.bank_accounts')
-    def on_change_with_bank_accounts(self, name=None):
-        if self.party and self.party.bank_accounts:
-            return [account.id for account in self.party.bank_accounts]
-        return []
+    def get_company_info(self,name):
+        return (self.company.party.name == 'MELYA')
+
+    def _get_default_bank_account(self):
+        if not self.party or not self.party.bank_accounts:
+            return None
+        party_bank_accounts = list(self.party.bank_accounts)
+        if self.currency:
+            for account in party_bank_accounts:
+                if account.currency == self.currency:
+                    return account
+        return party_bank_accounts[0]
+
+    @fields.depends('party', '_parent_party.bank_accounts')
+    def on_change_with_bank_accounts(self, name=None):
+        if self.party and self.party.bank_accounts:
+            return [account.id for account in self.party.bank_accounts]
+        return []
 
     @fields.depends(
         'company', 'party', 'invoice_party', 'payment_term', 'lines',
-        'bank_account', '_parent_party.bank_accounts')
-    def on_change_party(self):
-        super().on_change_party()
-        if self.party and self.party.bank_accounts:
-            party_bank_accounts = list(self.party.bank_accounts)
-            if (not self.bank_account
-                    or self.bank_account not in party_bank_accounts):
-                self.bank_account = party_bank_accounts[0]
-        else:
-            self.bank_account = None
-
-    @classmethod
-    def default_wb(cls):
+        'bank_account', '_parent_party.bank_accounts')
+    def on_change_party(self):
+        super().on_change_party()
+        self.bank_account = self._get_default_bank_account()
+
+    @fields.depends('party', 'currency', '_parent_party.bank_accounts')
+    def on_change_currency(self):
+        self.bank_account = self._get_default_bank_account()
+
+    @classmethod
+    def default_wb(cls):
         WB = Pool().get('purchase.weight.basis')
         wb = WB.search(['id','>',0])
         if wb:
diff --git a/modules/purchase_trade/sale.py b/modules/purchase_trade/sale.py
index c6044f9..8671094 100755
--- a/modules/purchase_trade/sale.py
+++ b/modules/purchase_trade/sale.py
@@ -263,6 +263,16 @@ class Sale(metaclass=PoolMeta):
     def get_company_info(self,name):
         return (self.company.party.name == 'MELYA')
 
+    def _get_default_bank_account(self):
+        if not self.party or not self.party.bank_accounts:
+            return None
+        party_bank_accounts = list(self.party.bank_accounts)
+        if self.currency:
+            for account in party_bank_accounts:
+                if account.currency == self.currency:
+                    return account
+        return party_bank_accounts[0]
+
     @fields.depends('party', '_parent_party.bank_accounts')
     def on_change_with_bank_accounts(self, name=None):
         if self.party and self.party.bank_accounts:
@@ -274,13 +284,11 @@ class Sale(metaclass=PoolMeta):
         'payment_term', 'lines', 'bank_account', '_parent_party.bank_accounts')
     def on_change_party(self):
         super().on_change_party()
-        if self.party and self.party.bank_accounts:
-            party_bank_accounts = list(self.party.bank_accounts)
-            if (not self.bank_account
-                    or self.bank_account not in party_bank_accounts):
-                self.bank_account = party_bank_accounts[0]
-        else:
-            self.bank_account = None
+        self.bank_account = self._get_default_bank_account()
+
+    @fields.depends('party', 'currency', '_parent_party.bank_accounts')
+    def on_change_currency(self):
+        self.bank_account = self._get_default_bank_account()
     
     @classmethod
     def default_wb(cls):