After trying out YoBit,I'd want to start marginal trading.The usual bitcoins to alt and vica versa.The site must be very supportive,less document requirements and supports most of the altcoins.
Also I will be day trading at times or invest in a stable alt for a week/month.My main concern is support,they trading website must support most of the alts and definitely bots.
According to your recruitment I understand that you need the exchange that is available for us to give and take loan for the trading ( reffered as marginal trading) .
This is on and only one Poloniex , you can make money through the give loan and also take loan for marginal trading and also as per your requirement you can use bot for your trading .
But here a big thing that I need to tell you is that male trading with the help of bot should be carefully , I mean you just need to take some study from the Poloniex that how to handle a box