Ok, I see your point now, and what we are back to is the individual approach again, which of course is all dependent on time available, capital, family, etc..etc.
We are all different with different "living" circumstances - so, as many have reiterated on this site, many many times, pick the best approach that suits YOU, which is really common sense!
It is no good trying to learn daytrading the open, if when the bell rings you are going to be sweeping the floor of the gym, pulling out a big dirty rotten tooth, or changing a baby's smelly nappy
Common sense is not that common really, but that is a whole new discussion for another day!
To try get back on track - how do YOU determine YOUR daily profit target - one answer is YOU determine it based on what time you have available to trade, what approach you use, and how well you understand what you are doing.
Personally, I find that a specific AR computation for certain stocks, will, on average, in 4 days out of 5, hit either your up or down target, and some days hit both!
What use is this?
Very useful if you can get on the right side of the trade asap, which of course is the hard bit and will only get better by gaining the required experiences and learning how to act and react to an ever changing environment - this does not mean you jump in and out repeatedly (whipsaw), but it means you enter at your first "identified" opportunity, and be ready to reverse trade if that opportunity does not work out and your "second" identified opportunity has materialized.
This "action/reaction" gives you a far better chance of you hitting that daily target, which, can happen on average, 4 out of 5 days as mentioned.
Is that a so called "edge" if it works - you tell me?
J_S