Okay,
let me get this right...
I am hearing a TON OF DIFFERENT THINGS.
I hear that if you account is known to be a day trading account you will not really benefit from portfolio margin.
Tell me if I could benefit.
During the middle of the day one of my trading models makes me dollar neutral half short / half long. Because of that I can throw a lot of money using this model. The fact that I wasn't aware of PM and only new of 4:1, I went prop, however if I could get an average of 6:1, I could barely sling retail which i'd rather do. Also I have other models that trade during open, close and mid day, but I'm never too deep in the market.