AFAIAA? What?
Seriously. You have to have physic powers to trade forex. Can you move a market by mind power alone? If the answer is no, then the fx is not for you.
Okay, really, really seriously. I would love to have the volume displayed. You can get the data for the euro or the dollar by themselves, but you won't get the volume for the euro/dollar pair etc.
Any chart that shows it, is not giving a true reporting picture (I would love this to not be the case.) This is according to the likes of fxcm etc. The explanation being that because it's otc and so massive it can not be reported. Has something to do with the interbanks and the interbank rates. If it was traded from one source, then it would be easy to plot volume. (This is how I have been led to understand it.)
So to answer your question. Because the markets are so massive, they trend better. Stop and res and trend line breaks work well. Any basic TA works well when you have studied the market you are interested in.