I hadn't realized Gekko was able to do arbitrage and market making, I'll dig into that a little.
You can't, apologies if I wasn't very clear:
With Gekko you can only do TA trading, but I write a ton of trading software (Gekko is open source, my other stuff is private). Over the years I haven't found a single system that was able to return profits time after time.
I use a bunch of trading systems, these include different gekko instances running at different exchanges. The gekko instances use TA strategies to: try and ride trends as well as limit market risk (be sure to get out in case things might crash).