I wrote the bot myself, so it was free, but it took around 3 days. I also already have servers (witness, my websites, whive...), so I don't have any extra cost with it.

It's still pretty experimental, so I normally only use it under my supervision and it's not running 24/7 yet, since I don't trust "him" and so I can fix it when something breaks.

But even just by using it to notify me when there is an opportunity, it's still profitable (I made over $150 last week with few trades).

I'm thinking about making access to notifications public (maybe with a discord bot).