Repeat Trades

 
How can I ensure the same trade (using the same magic number) cannot be placed again until the existing one is closed?
 
Test for that before opening a new one.
 
William Roeder #:
Test for that before opening a new one.

How?

 
luxecapital #: How?

You have only four choices:

  1. Search for it (CodeBase or Market). Do you expect us to do your research for you?

  2. Beg at:

  3. MT4: Learn to code it.
    MT5: Begin learning to code it.

    If you don't learn MQL4/5, there is no common language for us to communicate. If we tell you what you need, you can't code it. If we give you the code, you don't know how to integrate it into your code.

  4. or pay (Freelance) someone to code it. Top of every page is the link Freelance.
              Hiring to write script - General - MQL5 programming forum (2019)

We're not going to code it for you (although it could happen if you are lucky or the problem is interesting.) We are willing to help you when you post your attempt (using CODE button) and state the nature of your problem.
          No free help (2017)

 
jsc #:

How?

Loop through the open orders and check if an order exists using OrderMagicNumber().
If it does, don't open a new order.

 
jsc:
How can I ensure the same trade (using the same magic number) cannot be placed again until the existing one is closed?

Do you create your own EA?
If yes, you can try this one:

input int MaxOpenPosition = 1;

...

void OnTick()

{

if(OrdersTotal() < MaxOpenPosition)

{

Your code here;

}

}

Reason: