how about: forex, demo, account, cmc, online, trading, currency, currency trading

Alone Your nick name shows, that you do not understand the AdSense business.

You think it's a magic spell and "Plop" there is a basket full of money in front of you.

But it's much work to generate content and from month to month, there is more money.

I'm pretty sure the discussion of keywords (specific) is not allowed by charter (see TOS), but in any event the forex keyword in particular is not highly ranked because of all the scam sites out there.