There is no real stop point but I think that you can know when you have to stop when you are getting greedy..
A lot of people do not stop when they are and lose a lot of money due to that.
Right! When it comes to gambling There are no indications for you to know when you have to stop playing or have a short break . Even when you are getting greedy is not considered as a indication you will only stop after losing all of your money .