In reply to saraTel:
You could insert a transaction count variable into the transaction, but the monitor would have no way to know if the sequence is going to generate 10 or 10000 transaction. i.e. which one is the last it will receive.
If you need the monitor to recognize the ‘dummy’ transaction from the others, you could just add that a variable in the traction class.
int unsigned dummy_trans; ## 0=real; 1=dummy