The usage is very easy. When the line is green you can open long position, when the line is red you can open short position and when it's black just check by yourself.
Usually I use it with RSI and Bollinger Bands , in order to determine when the signal is strong or weak.
Just play with fastest and slowest SC to adjust the smoothness.
This is a light weight code and strategy. I tuned it for NZDUSD on a 15 min chart. NZDUSD is a slow moving low volatility pair. A single SMA cross over + crossing a .9 BB + the single SMA is increasing. I will be manually trading this with alerts and once I have LUA down I will set it free with FXCM and see what it can do on it own.
** I use BB as a means of...