Quote from riskarb:
For those of you looking for a more active method. Don't passively-define the distro and sell stops. Pick long and short entries and sell synthetic straddles into that prediction. Trade... you're not buying bonds or munis here.
Choose an appropriate charting duration;1d, 60m, 30m, 15, 5m, etc... and trade the signals. I would look to the 1d and 15m for triggers.
A high confidence short should be met with atm short calls or a 1 sigma otm put strike short synthetic straddle[sell 30d puts into a long signal]:
SPX -- 1320
Sell 2 ES Oct 1300 puts
Sell 1 ES Dec F
Match the sigma to the duration so that you're reasonably confident that the market won't roll beyond your short strike and invert your deltas. Delta/smile gains should exceed any vega hit under 2 sigmas.
Buy wings or offset if you have some edge upon reaching the strike. If we rally you can off the short futures and buy an atm put for some vegas.
The above is only recommended if you're shorting gamma exclusively. If you want to buy some vegas, then trade long [inverted -- short under long(puts)] diagonals or long time spreads into a short signal.