When to stop trading? I made enough money for today? These are questions that much traders forgot to answer himselfs while he's trading and they are part of they risk strategy too. You don't need to make thousand of money every day to have a decent living from your day trading.
If you want to make $50,000 / year your dayly target it's $200 you don't have to make all the $50,000 in the same session. You achieved your daily target? Ok, relax, take a break, coffe or whatever, enjoy your time your work it's done.
This indicator will help you to understand if you acheived your goal for today in terms of wining or loosing trades.