From this point on - you are MO to me - hope this is agreeable
Let's break your questions down and see what we end up with
BTW - disagreeing..., is how we learn..., and why mkts exist
So no matter if we do.., or don't - we always can

(least imo)
Besides..., group think sucks - also imo
Traders are first..., foremost..., always - independent thinkers
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(A) If you have met your goal for the day, but the trade exit according to plan has not occurred (this is the situation I am currently in as I type this post), do you wait for the trade to be exited as per trading plan or do you close the trade 'cos your goal is met?
First thing that comes to mind - this is bordering / if not actually - trading one's PnL
Entered a trade to see it through - win or lose
Trade wins - you made goal - stop
Trade breaks down - you haven't made goal - long as you're okay / mkt conditions conducive to trading - you've work to do - keep on truckin
(B) In the other thread, you mentioned that you goal was to extract a % of ADR.
Did I get it right?
If so, how long a time period do you use to calculate ADR? And why that time period?
I really like this idea for a variety of reasons -- the main one being a driver to constantly look for ways to enhance one's trading, but not necessarily for a 'money making' goal.
Goal is to make a % between X & Y - of my net trading capital - in dollars - each day
I do so by extracting a % of the ADR
As to the second part of your question -
I track the daily range - by copying each day's H/L/O/C into excel - along with the days date
I then capture various events for said date (examples being - earning announcements / opt expiry / FOMC / other stock's related to FB - events..., a few others)
Then plot a chart
It surprising how enlightening this is
(C) If you have met your goal for the day, and the market provides you with what you consider a high probability signal, do you still forgo that trade?
Ahhhh..., we've know each other for such a very short time - and yet you're already asking me to break the rules
My rules say I stop - I stop
There are many things I could add - but they all distill to this;
The need to follow my rules..., far and away outweigh any short term gratification I might derive from breaking them just to make additional $'s
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Aside; (my take on high probability signal(s) )
No matter the context surrounding the next signal I trade
No matter if the Good Lord himself..., came down and told me - to my face - that this next trade is going to be a winner
Every...,
and I do mean every - trade..., only holds a 50 / 50 shot at working
That is the extent to which I have embraced uncertainty (I live and breath it to my core)
And yeah I can read the signs..., and yeah sometimes (a lot of sometimes) I do know because it that obvious
But no matter
It is uncertain..., and it shall remain uncertain - and because it uncertain - I am never one bit hesitant to exit while the loser still small
Interested in your thoughts. Looks like we might have a divergence of opinion here -- not necessarily a bad thing -- but your answers could be highly educational to me.
Divergence is healthy..., and conducive to learning at times..., with the right participants
hth Sir
RN