Quote from SProbability:
Hi Walther,
Do you mind saying how this is done? Also will it work on signals derived from esoteric strategies like say Gann's square of nine or astrology?
I suspect what you say is possible, but I would lke to have an understanding of the process of reverse engineering signals.
Thank you.
This is just simplified description how institutions do it . Boss comes to a geek and tells him to make a system which will create these trades ( supplied by system seller for evaluation ) Geek goes to their system library and runs it on the market of a choice .Trades generated by systems library are matched against system seller trades and the identical ones are picked out .
At this point, all the library systems that produce at least 20% of the same trades are backtested on the same market as sellers system.
If any of the library systems has better backtested performance, sellers system is rejected.
If the sellers system has better performance then they take rules from library systems for all matching trades and make combined system and adjusting rules till they beat sellers performance. If they cannot beat it they will buy it .
So unless one has a personal ties to upper decision makers at that institution and they want you to work with them, seller's chances are not that great .
I do it little bit differently and not as precise as they do it but results are always the same.
As far as Gann goes , it does not matter at all how the signals are generated they will just generate identical signals using something else or they write their own formula .
Gann mechanical systems are not profitable though.