Normally in SO, we know how our reputations go up as they are displayed in the user profile...
But there is no way to know how they go down...
Can there be a way to display reputation reductions as it will help users to know where they have gone wrong thus can improve their behavior on SO community???
Thanks
The "reputation" tab in your user profile already shows events that cause your total reputation score to decrease. For example, it shows downvotes that you have cast on other users' answers (-1 each) and it shows downvotes that other users have cast against your posts (-2 each).
(However, not all of this information is available to other users browsing your profile, so there's no cause for concern that people might retaliate against your downvotes. See here for details.)
The only two things I can think of that can cause you to lose reputation but are not currently shown are:
The former has been feature requested here, and there seems to be little to no reason to provide a history of the latter. The developers really shouldn't waste any time improving the site for spammers.
As well as the methods that Cody mentions if your reputation is recalculated then you won't know why it's changed. Does the value got by running https://stackoverflow.com/reputation match your "headline" reputation?
The vast majority of the time it will go down due to questions (and their answers) being deleted which isn't reflected immediately in your reputation.
As to why your reputation was recalculated (assuming you didn't do it yourself) I can only guess. The most likely cause is that you were the recipient of some suspicious votes. When these are removed your reputation is recalculated. A moderator could also have done it manually.
