Why does one trade keep you up at night? It’s usually not the market’s fault—it’s the position size. When I first started trading contracts, I always thought my anxiety came from market fluctuations. Later, I realized that the same 5% drop feels completely different depending on my position size. With a light position, I can calmly analyze the structure; with a heavy position, every single one-minute candlestick feels like it’s judging my life choices. Once your position size exceeds your psychological tolerance, you lose the ability to make rational decisions: a small pullback looks like a crash, a normal rebound feels like a reversal; when you should cut losses, you hesitate, and when you should hold, you fear giving back profits. In the end, it’s not the market that defeats you—it’s your emotions rewriting your plan beyond recognition. I used to stay up all night watching my positions too. The price hadn’t even hit my stop-loss level, but I’d panic and close out early after seeing a few consecutive red candles. Then, right after I sold, the market would bounce back. Looking back, I thought my judgment was wrong, but my entry logic was fine—it’s just that my position size was too big to tolerate normal fluctuations. The right position size isn’t about how much loss you can theoretically handle; it’s about whether you can still eat, sleep, and stick to your plan before the price hits your invalidation level. If a trade requires you to constantly refresh the charts to feel secure, it’s probably already beyond your risk budget. Remember: true position management isn’t about guaranteeing profits every time—it’s about maintaining the ability to make calm decisions even when the market is at its noisiest.