One of the most important factor of a successful gambler is to know when to stop, most gamblers expecially the addictive type don't even know what is stop when it comes to gambling. So it's very important to;
* Stop when your losing is now getting to you.
* Stop when you are now feeling as is you can't do without gambling.
* Stop when you have a big winning, by channeling the money somewhere else so you won't lose it back to gambling.
* Stop when you are not even winning at all, it's not your thing.
* When your losing is weighing you down, stop and restrategize .
I agree with your opinion but along with these, there are a few more factors to know when to stop. Eg: we should not make any bets when we are in sleepy mode or when we are too tired. We should not continue betting when we are busy and we do have not enough free time and so on.
Exactly gambling when is exhausted is not encouraging at all , he or she will endup making alot of mistakes in their gambling because that ain't thinking straight at that moment, they may even go ahead using money they can't risk to bet without even knowing. So yeah gambling when one is tired or exhausted ain't smart at all. So that's definitely a nice point mate