I have a trx unconfirmed transaction fore more than 5 hours in finexbox exchange...this exchange have a few trading volum with few users and transactions and i wonder why they take all this time to confirm just a simple trx transaction
![Huh](https://bitcointalk.org/Smileys/default/huh.gif)
You asked an inaccurate question. As an exchange, they don't confirm your transactions, the miners, stakers do confirmations. The responsibility of exchange is to approve your transactions (withdrawals) and broadcast them on networks. Then the rest responsiblity to confirm are for miners.
Exchanges in their sides, need to broadcast your transactions with appropriate acceptable fees to make sure miners will take it and confirm it ASAP or at least not too long annoying waiting time for their clients.
If your withdrawal was broadcasted by Finexbox but has not yet been confirmed by miners, you can only wait. If your withdrawal was not approved, ask them with a support ticket.