Like other WHMpress shortcodes Order button is fully customize able. You can place order using it for any service/ duration and it is fully customize-able for text and CSS.
Additionally you can pass any additional parameters for WHMCS like template and cart template for ultimate control.
Place order for service in default currency for yearly billing cycle.
Place order for service for shared hosting in default currency for 2 years.
Place order for a VPS in Pound for Monthly billing cycle.
Place a dedicated server order defualt for Monthly billing cycle.