If the combined premium of ATM options when premiums are high generally expires with profit then that becomes a tendency. A study has to be made to check if that tendency has been existing in last so many years. And it exists in past few months. What percentage of times its been profitable. By what amount the profit supersedes the loss or other way. Whats the consecutive loss trades. Is it acceptable. Whats the return against the margin blocked. That in my opinion is a good study and forms the basis for further studies in that direction.
Madan has written a good thread on same. In the end its profit/loss that is made after a series of trades that we are interested in be it futures /options.
Sorry if your among those traders who can find near certain trades which generally is always profitable i am not in that league . I ll end it here.
Well now you are talking futures data.