The article isn't about discretionary trading. It's about algorithmic trading, which is a bit like the word 'hacking' in that it means one thing to practitioners and another to the general public.
To practitioners it refers to the use of algorithms to trade large quantities of stocks or futures or whatever. The goal is to reduce trading costs by executing small trades at the right time. This is distinct from and rather more common than quant trading where an algorithm actually decides what bet to make.
To practitioners it refers to the use of algorithms to trade large quantities of stocks or futures or whatever. The goal is to reduce trading costs by executing small trades at the right time. This is distinct from and rather more common than quant trading where an algorithm actually decides what bet to make.