Intruder at the top of the 20 meter amateur band?
Do exchanges like HF traders? I know HF traders themselves justify their own existence by claiming they provide liquidity to the markets, but I've always just sort-of rolled my eyes at that.
They only extract value and provide none, in my opinion, tax the profits heavily. I think every exchange should pad each order by a random number between 0 and 250ms, it would take care of it. The company profiled in this video add lag https://www.youtube.com/watch?v=d8BcCLLX4N4