There is no system if people can't see it or refuse to see it. The market is actually a very simple system. All it does is move the price to generate profits for the large entities who dominate that market. The moves are usually like this: move up to stops, move down to stops, repeat and rinse. Where stops are not present, but open trades are: move up to a little bit over the so called 'resistant levels', move down to a little bit below the so called 'support levels', repeat and rise. If someone is unfortunate enough to get trapped with a large loss, the market will keep going until he folds. Once the market's 'system' is understood, a counter-system then becomes possible and will yield a positive return.
All inventions that human kind ever made were the result of finding a"system" or logic to understand something that till that moment seemed to be random. Everything starts as random till somebody finds a logic in this random. But for finding this logic someone should have certain skills. People who don't have these skills will always say it is random. I have found mathematical proof that markets are not random at all.
I like all the random people, tells me they are clueless of how to trade. I like people who need to find logic in the markets as they need a reason for something to occur, very few actually know there are reasons price does what it does as most get it wrong. I am ok with taking the against all logic trades, matter of fact almost all my trades are this way.
Had I method, that worked for 6months, made me damn good money, sadly those market conditions kinda make it into a break even method. Recently deleted it. so basically going old school, the most basic non predictive method there is, using strictly short term momentum, when the market starts going up, jump on, when the market stalls, exit, on a so far up day ( reverse if down day ), don't trade against the longer trend. KISS people KISS!!
If you have to change your system every 6 months, then maybe you don't have a system. Are you quite sure KISS will work in 6 months time ?
I can't see buying high and selling higher, I watch volume/swing length and wait for reversals or define trend in my own way and wait for deep retracements that most might call change of trend on this bar, usually it will go back a bit to scare out the ones who did momentum type plays. Like drawing trend line and waiting for break, then waiting for the retrace back to TL. Pretty easy stuff that works. I like getting in where newbs are scared and getting out.
A good understanding of Market Profile is an excellent continuing education investment. You personally may think that a price is ridiculously overbought or oversold - but if the market spends a legitimate amount of time trading in that area - it's an accepted valuation. Time component plus price component. Things are worth what folks are willing to pay for them. Price trumps all.