Hello,
if youre looking for free trade bots, i recommend Pionex exchange with 16 builtin bots to choose from: dca, dca trailing, gridbot, infinity grid etc. All bots are implemented on exchange, so you dont need to use any 3rd party app, or pay montly fee for using bots. Pionex has very low trade fee, only 0,05%.
Registration link: https://www.pionex.com/en/sign/ref/PzseuqJV