doble tax query
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'tipo_de_analisis', 'terms' => 'premium', 'field' => 'slug', ), array( 'taxonomy' => 'par_de_divisas', 'terms' => 'USD/CAD', 'field' => 'name', ), );
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'tipo_de_analisis', 'terms' => 'premium', 'field' => 'slug', ), array( 'taxonomy' => 'par_de_divisas', 'terms' => 'USD/CAD', 'field' => 'name', ), );