already define the route but, error is not define

I have already define the route but, error is not define the route. Let me explain you what i have done my code.

ROUTE:

Route::post( '/member/import-single-trades', 'trades\ImportSingleTradesController@tradesImport')->name('member.add-single-trade.import-excel.import_fields');

<form class="form-horizontal" method="POST" action="" enctype="multipart/form-data">
                            

Now ERROR is :

Route [member/import-single-trades] not defined. (View: C:\xampp\htdocs\development\fresh\ytl\resources\views\member\add-single-trade\import-excel\import.blade.php)

via Chebli Mohamed