After presenting many theories and rules  for Trade and Money Management many beginners when they apply these rules on their trades they  don't get it in the correct way so , I picked this video to walk you through the steps in details to calculate your risk in trading the Forex Market .. 

This presentation is applying the rules on the GTS Platform but  you can definitely apply it on MT4 Platform .. see the following

The Difference Between a Stop and a Limit Order