Reason for massive dropp in targeted keywords?

[Total_Displays]

Our site at www.total-displays.com has ranked well for a variety of keywords over a long period of time. After the change on Jan 18th we have seen a dramatic drop in organic rank across a variety of keywords. Our site has very good unique content and has a large number of pages (it's a Magento site). Advice we have taken is that the site will bounce back after a few weeks but this does not seem to be happening.

Any advice please?

Thanks

Nick

[RobertFisher]

If you take a look at what changed first, there may be clues as to whether or not you changed something that should not have been. 
With any change we make in sites, we are very clear there will be fluctuations in the rankings for up to a couple of months. Now, typically, you will begin to see movement after a few weeks but it is not guaranteed. I would wait a couple of more weeks and see if you are moving back up. 
If we had a few more details we could likely help a bit more.

Note, you do have a few on page issues you might wish to address. (title tag length, keyword cannibalization, etc )

Best

[Highland]

You talk a lot about your content but nothing about your link structure. A quick search at Open Site Explorer shows a lot of authoritative backlinks but, amazingly, almost no keyword allinanchors (what OSE calls Link Anchor Text). Almost all of your allinanchors are "Visit Website" or "Total Displays". Only a couple had keywords (and both were on Squidoo).

You need to go get some link diversity and focus on your keywords. I'm willing to bet that your site has a generic popularity but no real power with the main keywords. A good link campaign could help in specific keywords.

Also, have you looked at your bounce rates recently? That could also contribute to this.