1. I have the strategy and its stops and its profit target automated in TradeStation (which that platorm/brokerage makes it easy to do). So it's put the nearest in the money 0DTE strikes on a chart and forget forget about it until the profit target is hit or the day is done.

2. Again TradeStation triggers the stop. The low of the day gives the trade room to run. I've found stopping on the open itself has a lot of whipsaws. And you definitely do not want to be long in a trade that is running new lows.

P.S. No crime in putting in a breakeven stop manually after the call or put has put on some profit to make sure it does not become a loss.

3. That's generally correct but there are days when both the calls and the puts are below their opens at the same time so no buy on either. For instance I just took a glance at the four QQQ strikes for Monday I have in my watch list and they are all below their opens, calls and puts. It is not an automatic switch from one to the other side during the day though it often is.

4. This is trading, and while the strategy is devised to run systematically there are plenty of options within its context for an individual trader to choose to take some money home.