Hello is there anyone here that trades the fair value arbs on above markets by system? I'm having a little bit of a problem with the calculations for fairvalue, buythreshold and sell threshold. I read a couple od articles about this strategy, and it said I need SPX(planing to switch this to SPY), ES, MID, OEX data, risk free rate and number of days to end for the contract. Actually what is MID and OEX? How do I actually calculate the fair value and overrated,underrated value??