STUPID EXAMPLE: lets say i want to back all favourites of every race if they reach 4 pre off. If after the whole day of trading, will it show me which races were winners so i know this or any theory could be profitable?
if above is yes can i do for eaxmple similar tests at the same time to back all favs at 4.5 + 6 and 2nd fav at 6 etc etc and separate the successful theory?
basically how do people test theories/ideas if you have work commitments and can only see the results in the evening with a change in your 'bank figure'?

much appreciated
Mike