Best Way To Spell CTR?

[clickthrough-rate]

There seems to be disagreeance on the spelling for clickthrough-rate.

Wikipedia uses clickthrough rate.
Some scientific journals use click-through rate.
The simplest version is the acronym CTR, which is spelled one way.

Which should we use?
And which do you use?

[JudderMan]

I've just ghost written an SEO book and used "click-through rate". Why? Because it's correct!

[clickthrough-rate]

I've just ghost written an SEO book and used "click-through rate". Why? Because it's correct!

You mean this version may be correct, because you say so? What is you reference? I do see that click-through should have a hyphen, as it is not an old established word. I could also see a hyphen between through and rate, but that would look odd, click-through-rate.
I think depending on how one feels clickthrough being established or not, one may use or not use a hyphen between the words.

Google uses clickthrough rate, source: Search queries - Webmaster Tools Help

[JudderMan]

With Google being American I'm surprised it's not click-thru. Proper English (and I mean UK English although I refer to that as English English) proves that it is the way I wrote it....and the fact Open Office (UK) says so, too.

:-)

[royjonesjr]

I have never heard anything about CTR, this thread helped a lot, thanks. Now I see its very important thing.