Very very bad name selection for this exchange... I mean BitmxittzEx....
It is even hard for me to type its name,
and when I looked on website I saw it is a clone of other exchange
https://www.greencoin.online!!! AVOID !!!
Yet, Binance also uses
https://bitexchange.systems/ exchange script which is also free script used by many exchanges.
BitExchange script demo
https://www.bitexchange.cash/login.
So using of common exchange script is not an issue. Coin security, support and features etc. are more important.
Hope BitmxittzEx success.