function CancelPendingOrders() {
    while (true) {
        var orders = _C(exchange.GetOrders);
        if (orders.length == 0) {
            return;
        }

        for (var j = 0; j < orders.length; j++) {
            exchange.CancelOrder(orders[j].Id);
            if (j < (orders.length-1)) {
                Sleep(Interval);
            }