I agree that a portofolio backtester would be a must. One must realize that the APIs are a delightful promise but not quite many people will have the skills or patience to handle them and appreciate the true value it can bring. So basically, APIs will tear appart the users between the ones who can squeeze the juice and enjoy the fruits and those who can’t.
Even better than a backtester, here is what C2 imagined and I believe it is the most right way to do it
Basically, it is a user friendly, beginner minded, time machine with which you can look at the strategies’ state into the past at a specific date, then perform decisions to build a portofolio just like if you were there that day, then there is an engine that forecasts results into the future (actually our present) much like forward testing.
@javicolonbo please consider to release a look-a-like tool for us, similar in spirit. It would become an instant must-have and help all kind of average users understand what’s the true impact of IAs, Dscore and so on, over time. Everyone would benefit !