extern bool UseTrailing = true;
extern int lMinProfit = 30;
extern int sMinProfit = 30;
extern int lTrailingStop = 15;
extern int sTrailingStop = 15;
extern int lTrailingStep = 5;
extern int sTrailingStep = 5;

if (UseTrailing) TrailPositions();  

void TrailPositions()
{
  int cnt = OrdersTotal();

  for (int i=0; i<cnt; i++) {
    if (!(OrderSelect(i, SELECT_BY_POS, MODE_TRADES))) continue;
    if (OrderSymbol() != Symbol()) continue;        

    if (OrderType() == OP_BUY) {
      if (Bid-OrderOpenPrice() > lMinProfit*Point) {
        if (OrderStopLoss() < Bid-(lTrailingStop+lTrailingStep-1)*Point) {
          OrderModify(OrderTicket(), OrderOpenPrice(), Bid-lTrailingStop*Point, OrderTakeProfit(), 0, Blue);
        }
      }
    }

    if (OrderType() == OP_SELL) {
      if (OrderOpenPrice()-Ask > sMinProfit*Point) {
        if (OrderStopLoss() > Ask+(sTrailingStop+sTrailingStep-1)*Point || OrderStopLoss() == 0) {
          OrderModify(OrderTicket(), OrderOpenPrice(), Ask+sTrailingStop*Point, OrderTakeProfit(), 0, Blue);
        }
      }
    }
  }
  
}__________________