Realized my sizing was way off on a DAX breakout

Been trading the DAX for a while now, mostly intraday. Got caught recently on what I thought was a solid breakout past 18,300. Had all the indicators lining up, volume was there, but in hindsight, I significantly over-sized my position. The market retraced hard, and while my stop was in place, the draw-down relative to my account size was much larger than I typically allow. It wasn't even a matter of the stop being wrong, but the sheer emotional impact of seeing that much capital at risk on a single trade. It threw off my whole day.

The lesson, clear as day, was about keeping position sizing consistent with my overall risk management plan, not letting a 'high conviction' setup dictate a larger bet. It's easy to get carried away when you feel like you've found the perfect entry, but sticking to your rules is paramount, especially in fast-moving instruments like the DAX. Re-evaluating my sizing model now.