Take a look here:
From this post, you can able to learn about most of the crypto trading bots. Nowadays Kucoin is also supporting some trading bot so you don't need to use an API KEY fro trading bot. Right now they are offering 1) Grid trading bot, 2)Futures trading bot, 3) Smart rebalancing bot and 4) DCA bot. All of them are free to use and very easy to use also.
I am also using BitUniverse (BitUniverse Technology Meets Trading, Your auto cryptocurrency portfolio tracker & trading bot), This exchange is also free to use, You can also do Futures grid bot with Bituniverse by importing your API key from an exchange.
Hope this information will be helpful for you. If you need further information you can write here, will try to give answer ASAP
Still using Pionex and Bituniverse. Everything is fine and regularly they provide updates when needed.
I am also a big fan of the Kucoin exchange Because I can easily use Kucoin trading for free. There are 4 bots available right now, all are free to use. You can try it from here: https://robot.kucoin.com/web/index?lang=en_US To get full access of this bot you need to use Kucoin app at your mobile phone.