I use a whole load of things, the most obvious is news flow (politics, large company news, commodity prices etc) and economic data, thats the thing the market looks at the most. Also need to look at equities to find out what market sentiment is e.g if market is risk averse USD will rally. I also use options risk reversals trades data to see which direction the market is expecting a particular pair to go. Always good to have an idea of long term fundamentals, so I like to know PPP data, get a clear view of which currency is undervalued/overvalued against others. Another point i guess is semi technical and that is understanding what kind of market we are in. Quant funds adjust parameters according to what type of market we are in and they bid certain pairs if its a bullish trend etc. It is not purely technical analysis because you get a feel of market sentiment by not looking at patterns and trend lines but looking at the way market is reacting to certain pieces of data and news. Fundamental analysis boils down to one thing, is this current price level a fair value???