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差价合约交易，或者说任何交易中，一个基本概念就是风险回报比。它简单来说就是你在一次交易中可能获得的潜在利润与可能遭受的潜在损失之比。例如，如果你正在关注一个$SPCX差价合约，目标是从当前价格141.29上涨到143.00，止损设在140.50，那么你的潜在回报是1.71点（143.00 - 141.29），你的风险是0.79点（141.29 - 140.50）。这给你带来了大约1:2.16的风险回报比。目标至少达到1:2的比例是一个很好的起点，因为这意味着即使你犯错的次数多于正确的次数，只要执行一致，长期来看你仍然可以盈利。
That's a solid explanation of risk-reward. One thing I've found helpful is not just calculating it, but also considering the probability of hitting each side – a 2R trade is less attractive if your win rate is extremely low.
That's a solid explanation of the risk-reward ratio, which is truly foundational. Beyond the raw numbers, how do you typically factor in the probability of hitting your target versus your stop when evaluating these ratios in practice?
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