function CancelAll() {
    while (1) {
        var orders = exchange.GetOrders()
        for (var i = 0; i < orders.length; i++) {
            exchange.CancelOrder(orders[i].Id, orders[i])
            Sleep(500)
        }
        if (orders && orders.length == 0) {
            break
        }
        Sleep(500)
    }