Welcome to the Q&A Forum

#1 As it is more descriptive. However keep in mind what Google doesn't want according to Matt Cutts, he says keep it short and sweet: “If you have got a three, four or five words in your URL, that can be perfectly normal. As it gets a little longer, then it starts to look a little worse. Now, our algorithms typically will just weight those words less and just not give you as much credit. “The thing to be aware of is, ask yourself: ‘How does this look to a regular user?’ – because if, at any time, somebody comes to your page or, maybe, a competitor does a search and finds 15 words all strung together like variants of the same word, then that does look like spam, and they often will send a spam report. Then somebody will go” and check that out.

first of all try to include those terms in your pages. You're already doing good (rank 6 for cfd provider) without even mentioning that keyphrase in your title neither in the whole content of your mostly relevant page http://www.accendomarkets.com/our-products/cfds/ use titles, h1 h2 and meta desc, without spamming them but try with a few tweaks and see what you achieve only with internal optimizations.