I can relate to Black Swans thought that some daily target might be a better approach.
This helps to smooth out equity curves, as already pointed out by Vaco.
The frustration of a bad morning can sometimes be dealt with by trading the Session Americano.
It has its own volatility, direction and range breaks to play.
It allows the chance to have 2 chances. If you're wackypete, you might also add the overnight ranges.
The benefits of trading the US after a bad morning is that because you have to wait until the US session starts, it gives you time to stop thinking of immediate revenge trading.
IMHO there's 2 ways to approach day-trading *targets*; either have a fairly fixed target in your mind per pips (with me it's anywhere around 30 pips/150 per week) or trade for a defined period of time, 7:30 'til approx 4:30, and call it a day until you've either reached that target or reached your daily loss tolerance...whichever comes first..
If you're target gets blasted through (for me that'd be 40+) and I've placed no limit, for example, you're about to close and the candle moves dramatically in your favour, then it's simply a bonus..
Practical examples (on the *smalls*)
Here's how I'm playing it these days;
If I have 2 winning trades in a row from my daily start then that's it. I know if I take 2/3 more 1 will be (probably) be a loser, possibly 2, therefore I may get 45-50 pips for the day, or be no bettter of if I'd stuck rather than twisted, but is the extra 15-20 pips risk really worth it for all that extra screen time? No guarantee that your morning gains won't be wiped out..
Conversely if I have 2 losers, from my start of the day, I know that I've got a bit of work (screen time) to do to simply b/e for the day, I'll need a run of 3 winners to be positive, if I get that 3rd winner in a series (to be perhaps 15-20 pips up for the day) once again that's it for the day...very unusual for me to take 6 day-trades in a day therefore again what are the prollys telling me?