Do brokers trade against your account? If they do how can you tell?
If I am going to sell 1 put I may as well work as a cashier in Walmart. I sell always 5-10 and a few times a year more. Always monthlys expirations. Its like they delay quotes or something otherwise I would short the stock just before the market close. Then the next morning when I got put stock it opens down so I dump it for a loss. I'm not holding a sinking stock. Bad enough I have to find ok trades now I have to trade against my broker?
Everyone has to have his own strategy, but my rule of thumb is only sell puts on a stock that I would want to own at my strike price. It has to be a stock that is making money, carries a low PE ( 16) and PEG ( 1), sells $20/share or higher (to keep commissions under control), preferably pays a dividend (for stability reasons and care of investors), and is ranked 2.4 or lower by 8 or more analysts. Apple fits those criteria. But I am always prepared to own the stock; otherwise don't sell puts. I sleep better that way.