Support Board

double RoundToTickSize(double Value, double TickSize)
  {
    if (TickSize == 0)
      return Value; // cannot round
    
    double ClosestMult = (int)(Value / TickSize) * TickSize;
    double Diff = Value - ClosestMult;
    
    double DifferenceFromIncrement = TickSize*0.5 - Diff;
    
    double Result;
    if (Value > 0.0 && DifferenceFromIncrement <= TickSize * 0.001)
      Result = ClosestMult + TickSize;
    else if (Value < 0.0 && DifferenceFromIncrement <= TickSize * 0.001)
      Result = ClosestMult - TickSize;
    else
      Result = ClosestMult;
    
    return Result;
  }