The NFA (National Futures Association) is a good starting point for learning about forex trading. The glossary of terms they maintain is not extensive by comparison to some other online forex trading websites, but it covers the basic terms you should know.

If you’re going to be trading in the forex market you should know what ask (also known as the “ask price” or the “ask rate” refers to. You should know what bid (also known as the “bid price” or “bid rate” refers to. You should be able to differentiate between the base currency and quote currency. You should understand about the bid/ask spread, opening a position, closing a position, currency pairs, dealers more.

Start your forex trading lessons with a look at the NFA’s forex glossary