Lesson Learned: The Siren Song of 'Just One More' in OPM

Alright folks, first post here. Been around the block a few times, mostly FX and some options. My biggest lesson, learned the hard way with capital that wasn't entirely my own (Operating Partnership Money), was the insidious creep of "just one more trade" when you're up. You hit your daily/weekly target, you've done well, everything's green. But then the ego whispers about more. You see another setup, feels solid, you push. And push again. Soon enough, you're not trading the market; you're trading your own greed, giving back half, then all, then some of the previous gains. It's a quick way to turn a profitable period into a flatline, or worse, a draw-down.

Now, I'm pretty rigid about closing out once the target is hit or the designated time is up, regardless of how juicy the next chart looks. The market will always be there tomorrow. My P&L, however, needs to reflect actual, realized gains. The thrill of making money is good; the discipline of keeping it is better.