Official guide to track topics.
First you find you're topic.
先找到你的交易帖子Then you click 'Track Topic' and 'Settings'
然后点击'Track Topic'和'Settings'
你可以让它纪录3到30天。有下拉选项
还可以加入自己的评论或标记
Then you find 'View Tracked Topics'
然后当你要找自己的标题的时候去settings 左面有一行小字点击'view tracked topics'
Then once you click that you should be at the point where you see all your tracked topics.
然后点击你要看的存储过的帖子就可以了 

And TADA!
You just tracked/ found topic in 3 eazy steps!
~~Jenny