The Law of One Price

When i was a pit trader, how do you make money at pit trader? Mean, my being stupid, ll right? And buying om a bit, selling on the offer and going home flat. Other people woll thend, the market changes and stop. The only successful use of automated models i've seen is in doing short term a brokerage. I could see it goout in by oad discuss undecisability and stuff like that. But there's a problem when you have recurseswer who don't know what they're talking about. You can never actually have a law of one price. Is a law of generally close sh prices. Anless something gad happen.