Larger profits than expected with "OverAllPips", can't work out why?!?!

Hi all,

I'm using the code below in a Robot that involves hedging... It calculates the total profit for all open positions and if that number is greater than (or equal to) my public parameter of 'OverAllPipsTP' the robot closes all open position and takes profit...

However, when my OverAllPipsTP parameter is met, the profits are often much greater than the parameter amount... Why?

EG: Set parameter to close all positions at 2500. Actual gain greater than 20,000 

double overallPips = 0;

            foreach (var position in Positions)
            {
                overallPips += position.Pips;

            }

            if (overallPips >= OverAllPipsTP)
            {
                Print("OVERALL PIP TOTAL = " + overallPips);

                foreach (var Position in Positions)
                {
                    Print("Closing All Positions. Num positions: " + Positions.Count);
                    ClosePosition(Position);         
                }
            }
        }
    }
}