Exchange is vital in trading. an exchange will affect our investment security. look at some time ago a lot of news about exchanges that experienced failure. so I think exchanges is very important, in addition to the security that a user interface will also be very influential because the more comfortable we are trading then we will feel comfortable in everything including helping the state of emotional control that we have. this is a dilemma because there are not many exchanges that have a good reputation, for me only a few exchanges that have a very good reputation that is like binance, bitfinex and bittrex. for other exchanges I do not quite believe it because it is the thing that will determine the future we have.