I just read this thread and I concur with redsheetz... Set a Stop Loss...PLEASE...even if its a 50 pip spread--set one. They can SAVE you and save you big. Lesson I learned the hard way. One of my first times (about 16 months ago) I was just starting trading Forex with real $$$ cause i had kicked butt in demo's--I thought stop losses were for play-it-safe wimps and I could rake in the $$ and ride out any change no worries.. WELL....

I took a cocky over-confident 3 lot trade, in the wrong direction, when the NFP came out much worse than had been hyped all week--and the EUR/USD blew out my entire mini account in about 25 SECONDS taking a HUGE drop over 100+pips, and I could not manually close out because the price kept dropping... My account closed itself automatically when my margin ran out... STOP LOSSES--take em like you take in AIR...they are GOOD and will keep you breathing and alive. I never set a trade without a SL anymore....
As for the EMA discussion--this IS a good discussion. EMA's are in my opinion GREAT for showing a direction & trends in a 4 hour chart--and Daily charts and other long term times.. In 5 or 15 minute or short term charts they are interesting to watch, but I find a bit hard to trade on, in how they cross and twist each other sometimes, because when 2 or 3 of your EMA lines cross in a long term chart, they can tend to indicate a change in trend or direction which is great to catch..or indicate the market moving down or up for that pair.
FWIW..I use 3 or 4 EMA lines...set at 30, 62 and either 5 or 15.. Just my personal preference I have grown use to--everyone has their own ideas on which is better. I like 30 and 60-62 range a lot better then a 20/40. For me, once I get a candle close over the 62 I know I am usually safely into a new direction, without a whipsaw or unexpected reversal catching me.. Backtest a 30/62EMA and look at the difference between that and a standard 20/40 and you will see what I mean...and you will see how a lot of the candles bounce off it and reverse...and when they cross it and close, they tend to follow thru most times... But EMA's are GREAT for long term charts for the hour+, days or weeks....
Here is a very interesting article to read on Indicators and Oscillators...not directly commenting to EMA's, but since folks seem interested in the TA stuff....
http://inet.intershow.com/teLessons/...d=fxNL10102005
-w