a big rally. ES was 41XX a couple month ago and now it is 46XX. That is the fact.
Bidirectional, or just single direction..... It boils down to how much you did expose to the market.
For example. single direction. 1 postion = 1 delta.
Bidirection or multi-direction: 1 combined postion maybe 0.5 delta or some other number. The money you made or loss is way less than 猛牛.
如果出黑天鹅事件,不管什么DIRECTION,都LOSE MONEY。
不过呢, 这些要自己慢慢体会
稳定赚钱和RISK CONTROL很有关系