Do you trade butterflies? If so, why and if not why not.* Basic flaw is as @sle pointed out, trade is taken with out evaluating richness/cheapness of the fly.
* Why use 90D ITM call with microstructure issues, when one can buy Future and short 10D puts
* He uses fixed width strike (40?) with 10 points below the current price to structure the trade and for back test. RUT was 400 was 10 years back, now it is 1600. All these are designed to simplify for masses.
* It is always on, so the performanance needs to be compared with levered beta. You don't need all the fancy software with all kinds of weird rules to evaluate. CBOE has done it for you.
View attachment 198456
So all the performance came from beta hedge. You would have better off just levering the beta itself.
* There is nothing special about different beta overlay (90D call [M3], Put verical [Rock?], Calendar), but each one costs about additional $1200 and up.
Used car salesman with snake oil is deadly combination
By the way levered beta can be very profitable this bull market. But what if the bull goes home will butterflies be better when that happens?