double unrealizedProfit() {
    double sum = 0;
    for (p : openPositions())
      sum += p.profit();
    ret sum;
  }
  
  double openMargins() {
    double sum = 0;
    for (p : openPositions())
      sum += p.margin();
    ret sum;
  }
  
  double unrealizedCoinProfit() {
    double sum = 0;
    for (p : openPositions)
      sum += p.coinProfit();
    ret sum;
  }
  
  L<Position> positionsInDirection(int direction) {
    ret filter(openPositions, p -> p.direction == direction);
  }
  
  L<Position> longPositions() { ret positionsInDirection(1); }
  L<Position> shortPositions() { ret positionsInDirection(-1); }
  
  L<Position> shortPositionsAtOrBelowPrice(double openingPrice) {
    ret filter(openPositions, p -> p.isShort() && p.openingPrice <= openingPrice);
  }
  
  L<Position> longPositionsAtOrAbovePrice(double openingPrice) {
    ret filter(openPositions, p -> p.isLong() && p.openingPrice >= openingPrice);
  }
  
  L<Position> negativePositions() {
    ret filter(openPositions, p -> p.profit() < 0);
  }
  
  double debt() {
    ret max(0, -unrealizedCoinProfit());
  }
  
  double profit() {
    ret realizedProfit+unrealizedProfit();
  }
  
  double coinProfit() {
    ret realizedCoinProfit+unrealizedCoinProfit();
  }
  
  S formatProfit(double x) {
    ret plusMinusFix(formatDouble1(x));
  }