Oh, Last time I talked to Rob, we were using some MACD stuff..

I have about ten different versions, why dont you tell me

which you want :

the 5 EMA crosses the 13 and the 62??

the 5 EMA and the 13 EMA crosses the 62??

I will let you specify the periods (5,13,26) and the time frame as a parameter under "inputs". Lets just call them FAST (5), MEDIUM(13) and SLOW(62).
You can also specify EMA, LWMA, etc.

So you want the Fast to cross the Slow or the Medium to cross the Slow?
I have written so many Crosses I think I can do them sleeping.

To answer your questions about periods, I think it depends how long you want to trade; if you want to hold something for weeks, use a daily or 4 hour; if you want to be a day trader look at something faster.

You can also mix time frames and you can look at other supporting indicators.

To answer your other other question, its the trailing stop setting.

Finally remember that all indicators are LAGGING indicators that can only display what has occurred in the past; be sure and know your fundamentals before you crawl into bed with an indicator. Read the reports, Google News under "dollar pound euro" and you can even use the Commitment of Traders report. Learn retracements, fibo levels, channels etc. A good trade is never one indicator.