Can Magento display discount code and saving in transnational Emails?

[jeffdude]

How can i show my customers how much they're saving after applying shopping cart price rule codes,

 it show on the checkout but not the new sale transactional email.

[liyakat9]

you can add new row after specific content directly to your email template to get Discount amount from order object as below

<table>

  <tr>

     <td>Total discount </td>

     <td> {{var order.getBaseDiscountAmount()}}</td>

  </tr>

</table>

Above code is just concept to place discount code directly in email template from admin 

Or if you wish to add in any phtml like in total.phtml

you can with 

<?php echo Mage::helper('core')->currency($order->getBaseDiscountAmount(), true, false);?>

hope this will work for you.