DaveN
Member
@Mark17, the several automated backtesters that I've tried are very good at the rote and basic historical "run-throughs" to assess an options combo structure. Those give me an idea of whether the underlying, say 80/70 BWB DTE11 for example, might do better than breakeven over the last few years since 2020.<cut>...
For those considering backtesting, why are none of you mentioning the automated backtesters now on the market?
This approach is great if someone is looking to fully-automate a trading approach, whether via machine or strict rules to be followed manually.
For me and the styles of trading that I use, where these fall short, is the ability to add subjectivity or deeper conditional structures to codify into the system. Then to be able to quickly run A/B comparisons. An example might be the type of adjustment you make after a 2.0+ Std Dev move down in the markets given some IV changes in the option change. Most of those automated backtesters aren't built to accomodate those additional conditions.
Adding each of these features can be an exercise in diminishing returns for the vendor, as well as introducing the likelihood of curve fitting the results. The development work is expensive to build into the software, and the user base is narrower and smaller.