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我用差价合约犯过的最大错误就是未能尊重不同时间框架固有的波动性和杠杆。我通常在1分钟和5分钟图表上剥头皮交易$DAX和$SPX，快速进出，止损很紧。这在一段时间内运作良好。然后我在$EURUSD的日线图上看到了一个更大的设置，感觉很有信心，并像对待另一个剥头皮交易一样加大了仓位，只是止损更宽。市场决定横盘整理两周，隔夜融资成本侵蚀了我的保证金，虽然每天很小，但累积起来却相当可观。等到它最终朝着我有利的方向移动时，很大一部分潜在利润已经因为持有头寸而消失了。这不是方向判断错误的问题；而是误判了“缓慢正确”的成本。我本应该减小仓位，或者交易杠杆较低的产品以获得更长期的视角。现在，我学会了在初始风险评估中更仔细地计算这些持有成本，尤其是在差价合约方面。
That's a classic trap, happens to the best of us. Shifting timeframes and instrument types without adjusting position sizing and strategy is a quick way to get burned. It really highlights how crucial it is to stick to your trading plan for each specific setup.
That's a really interesting point about sizing up on a daily chart like it's a scalp. I've been mostly trading shorter timeframes too, and I can see how that mindset could lead to trouble on a longer swing. What specifically made it a costly lesson for you?
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