function cancelAll(){
    var ref = false;
    for(var e in exchanges){
        while(true){
            var n = 0;
            var my_orders = _C(exchanges[e].GetOrders);
            for(var order1 in my_orders){
                ref = true;
                e.CancelOrder(my_orders[order1].Id);
                n += 1;
            }
            if(n==0){