I've seen this before.
It's pretty crazy to see because the bots are automatic.
So you literally see all these buy/sell orders pop up instantly.
(on a side note, another annoying bot is the one that will undercut every sell order the moment it gets placed)

The good news is, I think this tactic is only working now because the market is so bearish.
This would never work if the market was like it was in 2017 or even the first three months into 2018.
The sheer trading volume going on would crash right past it.

For now, you basically have 2 choices: hodl your coin or go for smaller set percentage sells.
For example, selling your coin at a smaller volume (spread over different exchanges if needed) when it hits your specific percentage growth.
Like 5 - 7% growth for example.