On the Opportunity Stages form, select Actions > New.
Specify this information:
Opportunity Stage
Specify a name for the stage. For example, Stage 1.
Description
Specify a description for the stage.
Opportunity Forecast Group
Close Probability Percent
Specify a number that represents the level of confidence in winning
this opportunity. When the stage is assigned to the opportunity, this
probability is assigned.
Win and Loss options
Select Win, Loss,
or None to define the stage as already
won, already lost, or still active.