"Forward Results" tab explanations

 

When we optimize on Metatrader 5, we can choose to make a Forward Analysis on a part of the history.

The results apear on "Forward Results" tab. What is the meaning of the first 3 columns in that Tab?

Forward: I guess is the profit or loss in the forward period we choose before.

Backtest: The results from the backtest period.

Profit:I really don't know what is this column show, can someone explain please?. I have some negatives numbers on this columns and not in the first 2.

 
Anyone can help please??? Thanks