I found a nice tool to promote my site for free! It generated some source code, then I put it on my site and let it take care of my link exchanges automatically. The generator can be found here : << URL Snipped >>

All you need for exchange!
According to your request of pagerank and category you create own personal link.
All your visitors (webmasters) can exchange link with you by your criteria without conversations.
All the pre-exchange data processing and checks are performed on another servers. Let them work!.
You don't need to build 'automatic link exchange system' by your self.
"No software/security alterations are required for the site.
All the extra traffic involved in the automatic exchange process is out of the site" !! (look their 'overview' page.)

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Thank You.