I use the same indicators on all markets but make sure that most of them align (with pretested value settings) to make a trading decision (entry or exit). Looking at the 4 hr chart and working down to 15 min. with an MA of an adaptive (ATRbased) RSI, and Stochastic plus Donchian channel with a center line I have a high sucess rate. Entering trades manually I also use an automated exit while away. Plus when entering a market like Crude I also consult HOil and Gasoil, same with trading indices or metals. There is more to this strat, for instance how to work in gap situations. Trading successfully with indicators is a long and individual learning process.
In my opinion, Those with the ability to write their own code aren't doing the same simulations/research/studies/experiments. The creativity granted by using a real programming language makes the possibilities for a skilled and clever enough coder endless. Those using commercial packages more likely are, in fact, doing the same things. If "richer people/companies" were all doing everything the same, they'd all be coming up with the same discoveries/inventions in other areas of life as well...using computers/CAD/simulators/etc. We know that's not true. Also, if what you suggest were true, there would be no poorer people/companies coming up with discoveries/inventions before "richer people/countries" did it first.
The "logic" here is almost breathtaking. What you're actually saying is that because professional and institutional traders have the facilities and resources to study such things accurately and you don't, and can't therefore realistically compete with them on that basis, you think it's better to study them vaguely and according to inaccurate, at-a-glance impressions.