so I have a butterflies for July on the ES which I paid debit of 84$ it’s 2920/2890/2860 max loss is the debit of 84$ now they are asking me for a margin of 440$ so I called the margin department and they say that there is a 16 calculated formula and the highest one is the margin requirement but anyway I break my head I can’t get to that number
what is a Mira ?