3848.05 is the level. Short Eicher Motors for the target of 3812 and then second target of 3784.
You can Short sept futures only when 30 min candle in spot closes below 3848.05 level. Option sellers can sell ATM options and use 50% of the premiums as SL , use this number. If option premium reaches above your 50% of selling price. then book SL in futures too, this is how you put your SL based on premiums of options.