Comet/HTTP push with nginx

We want to hire a programmer to setup a custom website using Comet/HTTP push with nginx work will be done hourly basis Task 1: Desc create [login to view URL] page on server will display price from product table, if we make changes in product price through another php file index page price should be automatically changed without refresh of page Note: I dont want to sent ajax request to server for checking price of product every second / min / hour