EA search: delete pending orders, max 1 trade at a time

Hi,

I would like to test a strategy on demo that allows me to only have 1 open trade at a time.
I will be using pending limit orders on different pairs that i set once a day. When one limit order gets triggered ALL the other pending orders should be deleted.
An EA that only allows 1 trade to be active at a time should also do the job.

Has anyone found something like that? I have been searching a few hours now without success.

Thanks in advance,
Nik

It is simple. You have scan orders. If you found market order (OP_BUY or OP_SELL) , start closing all pending orders. Also prevent opening new pending orders
when your market order is active one.