why not just buy something like ForexTester for a couple of hundred?
it’s very quick and easy to learn to use it, following the instructions
it makes far more sense than trying to develop a profitable trading method without it
it’s about whether you want the odds in your favour or against you, really
as i was just mentioning in another thread, while you made your post, it doesn’t (quite) follow that a thoroughly backtested method which would have made consistent profits in the past will necessarily still make them tomorrow, but it’s still miles better than trying to trade with a method you haven’t becktested by running it over a decade’s data
that would be a poor approach, by comparison, to put it mildly
there are people (especially in forums) who will try to convince you that because backtesting is done on historical data and your trading will be done on future data, backtesting has no value. that view is total rubbish, of course, but probably they believe it themselves, on some level, or at least they hope it’s true, and sometimes (actually quite often) when people believe total rubbish, they want other people to believe it, too