It's not a requirement, but I recommend all of you to use imdb code to make your thread looks better

It's very simple, take an example below:

A normal IMDB link is "http://www.imdb.com/title/tt1477076",
just remove everything and keep only "the numbers" at the end, like this "1477076".
After that, just put these numbers into the "IMDB code", like this [I M D B]1477076[/I M D B] (without space)

And here is the result: