I am starting small with a margin of risk of $12.50. I know the earning potential is pretty unlimited but how to I know when to close the deal and take the profit. I dont want to be greedy. I am thinking $12.50 would be a minimum. What do you thing?

When I open a position in the forex market, I have a reason for it–technical or fundamental. When the reason no longer exist, I close that position.

I do not use a fixed number or percentage, but let the market tell me when to get off.

Hope this helps.
- Jim http://jsforex.blogspot.com