I have been using Leonardo Market maker for almost a year now.
It has, all round been great, constantly being developed and improved, support has been fast, when needed.
At the end of the day it is still a trading tool and you still need to choose the markets.
If you start trading with a bot at the top of a pump, you will very likely still be underwater for a while. But if you fire them up on buy signals they can be quiet profitable.
I used quatloo trade briefly, with much pain as it made a few decisions i didn't agree with. And tried using butterbot but i fired it up at the top of a btc spike, so it was underwater for a long time.
You can trial the bot before purchase, if you do go ahead and purchase please use dan_and_shan in the referral box. Ill get a small referral bonus
I would definitely recommend Leonardo, it paid for itself in the first few days.
http://marginsoftware.de/product.html https://bitcointalksearch.org/topic/margin-terminal-over-25-spot-and-futures-exchanges-bots-and-more-1467939 Happy Trading