Custom fields
$meta_query = array( 'relation' => 'AND', array( 'key' => 'moto_price', 'value' => '1234', 'compare' => '<=', 'type' => 'NUMERIC', ), array( 'key' => 'moto_featured_currency', 'value' => 'USD', 'compare' => '=', ), );
$meta_query = array( 'relation' => 'AND', array( 'key' => 'moto_price', 'value' => '1234', 'compare' => '<=', 'type' => 'NUMERIC', ), array( 'key' => 'moto_featured_currency', 'value' => 'USD', 'compare' => '=', ), );