I think what I&#x27;m looking for is specific acts that are unethical. What action have they done which is unethical? What will trigger my conscience?<p>Putting a net over someone&#x27;s garden, I can see that as an unethical act because it infringes on the other person and my conscience feels bad for the person under the net. Is there a similar concrete action that I can see as unethical in the trader&#x27;s systems?<p>Paying a huge sum of money to put machines inside a stock exchange&#x27;s server room (I think people do that?) so they get lower latency for example. I don&#x27;t see that as being an unethical act. Both the stock exchange and the trader are entitled to do whatever they want with their own systems in their own buildings, and presumably a fair price is being paid for the privilege. Nobody else&#x27;s property or quality of life is infringed.