比如一个PUT,
bid 0.4, ask 1.4,两边都有3000个orders,但是我挂一单mid price,总是成交不了,这是什么原理?
比如一个PUT,
bid 0.4, ask 1.4,两边都有3000个orders,但是我挂一单mid price,总是成交不了,这是什么原理?
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