Yes it's true that some people are chronic addicts who can easily control any volume of alcohol they consumed along the line at a time can walk and work perfectly fine without anyone noticing it. Although initially I didn't know he was only monitoring his trade with the smartphone, while I thought he was trading, I tried confirming from him the next time we met again and he said wasn't really deep into trading that very day he was monitoring rather.
There are several phases during which alcoholics are still able to control themselves and their brains, but to a certain extent they will lose their minds and will influence their decisions. Trading while drunk is ridiculous, but they can still trade while feeling sober or relaxed. Of course there are some traders who trade while drunk, but the drunk phase is not to lose their minds. I mean they can still control everything, including being able to trade.
Its the tipsy stage where you can still know everything, can think well, can decide well and can walk well which this kind of phase for sure they can still manage their emotions and decision making. Sometimes i do have a one bottle of beer when i do trade just to relax and chill but when it comes to like coming from a party and drunk , i wont be doing this as for sure this will be a huge problem and losses for me. That is why others dont really install the trading app on their phone and going to party because sometimes we cant control our ego and we will be boasting it to others.