I have traded very long term commodities since 1991, 60% of what I have accumulated in my 401k self directed, I strictly do extremes, some trades has been more than seven years in durations. I have recently, well...past five years have increased many aspects of my system to generate much more signals, but all add-on signals done, most would insist trend has changed. My high risk tolerance has increased through the years and have found how to reduce the risk to almost nil. And yet my profitable overall trade situations by the years seldom change from 5-15% of trades are profitable. The trades themselves have become very complicated and had to become automated, am old at 61, memory not as keen any more, can't scalp more than three markets either. Longer term trades I find very interesting as you either learn to spread well and sell options or you make no money, ex earlier Eurodollars where nearly topping for very long time and have come down. Although the exciting markets do many huge sums when I have nailed extremes, sometimes takes years before they happen, so have to be very content to make little during some years and huge on couple years, like I started going short Indexes April of 2016, have targets for 10% of the position and made some of those and 90% get stopped out at breakevens, maybe finally found the highs this year, don't know and be honest don't care, eventually everything rotates. My system does have indicators and have added Quantum physics for better cycle expectations, despite having indicators, I am a very good chartist but am very open minded to use whatever that will expand my edges. To each it's own.
In stocks have a limited system based on the above but much shorter time frame as stocks 65% of the time goes up, trend is your friend and all that bs.
Day trading/scalping average down on everything, don't recommend, most signals catching falling brick.
Long term Commodities risk is next to nothing and at times positive expectancy, huge reward to risk with now many add-on signals but very low percent profitable, scalping is opposite-very high winning percentages with great risk to reward, it does not get any better than this for me at this point. Perhaps down the road when I learn differently... But very short term trading has the greatest risk for me, even after 34 years of it.
Most don't like long term cause they lack patience and "no action" in long term, also they have no money and lack education, I like boring. I like very smooth equity curves and low drawdowns.
Good luck.