gistfile1.html

<a href="http://twitter.com/share"  
data-url="{{ tld }}/{{ current_page }}?analytics=tracking_here" 
class="twitter-share-button" 
data-text="{{ offer.reward }} Rakeback at {{ offer.name }}"  
data-count="vertical" 
data-via="your_twitter_name">Tweet</a> 
<script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>