Trading Core里面学的Delay Costs(Slippage)是这样的

但是Trading Pathway里面说的Delay Costs(Slippage)是交易员抠鼻子上厕所耽误的时间,也就是下单晚了没有赚到的部分。
然后Equity里面又说了Slippage Cost is often measured as the difference between the execution price and the midpoint of the bid and ask quotes at the time the trade was first entered

感觉这三个说的都对不上啊?